@BSilvEsq is conflating pre-determinism with determinism. They are not the same thing.
It is ludicrous to imagine that the Big Bang has the ability to write symphonies, create works of art, or erect magnificent buildings. Humans do that by choosing among alternatives.
Humans are part of the deterministic process.
		
		
	 
OK.  I get it.  You believe in free will -- either because you freely choose to have that belief or because that is the belief you are caused to have by antecedent activity that dates back to the beginning of time.
I am not conflating pre-determinism with determinism.  I am applying a definition of Causal Determinism that is well accepted in the philosophy community.  As I stated in my prior post: 
	
		
	
	
		
		
			Determinism posits that all activity in the universe is both (i) the effect of [all] antecedent activity, and (ii) the only activity that can occur given the antecedent activity. That is what is meant by saying that everything is “determined” (or “pre-determined”) — it is the inexorable consequence of activity that preceded it. In a wholly deterministic universe, everything that has ever occurred, is occurring, and will occur since the universe came into existence (however that might have occurred) can only occur exactly as it has occurred, is occurring, or will occur, and cannot possibly occur in any different manner. This mandated activity necessarily includes all human action, including all human cognition.
		
		
	 
To that I will add the following:
A great number of discussions of Causal Determinism explicitly or implicitly assume that a combination of perfect information about the past and perfect information about the present instant would, necessarily, permit a perfect prediction of the future if the universe is truly and entirely deterministic. Personally, I reject that predictability is an aspect of Causal Determinism. As I understand it, Causal Determinism posits only that everything has a cause and cannot occur in any manner other than how it does occur — without regard to the ability to predict or replicate that activity. Causal Determinism does not posit that the factors that have caused, are causing, or will cause any particular activity can be known or understood, or that any specific future activity can be predicted with any degree of certainty.  Indeed, if the tenets of Determinism are taken to their logical conclusion, Determinism, itself, makes it impossible to know how the totality of all prior activity will interact to cause the next occurrence of activity, because the totality of all prior activity has never before coalesced.
To be clear, in philosophy (as contrasted with theology), "pre-determined" does not mean that a deity or other conscious, intelligent, deliberate or purposeful entity or force has made a decision to impose a certain future.  Rather, the term simply means that all past activity (which most folks agree to be fixed and unchangeable after the fact) inexorably causes all future activity, thereby rendering the future activity to be as fixed and unchangeable as the past activity.  As stated by Karl Popper:
	
	
		
		
			“The metaphysical doctrine of determinism simply asserts that all events in this world are fixed, or unalterable, or predetermined. It does not assert that they are known to anybody, or predictable by scientific means. But it asserts that the future is as little changeable as is the past. Everybody knows what we mean when we say that the past cannot be changed. It is in precisely the same sense that the future cannot be changed, according to metaphysical determinism.”
		
		
	 
You state:
"It is ludicrous to imagine that the Big Bang has the ability to write symphonies, create works of art, or erect magnificent buildings."
Ludicrous is a strong word and one that does not belong in philosophical debate.  Causal Determinism is a metaphysical paradigm that is both robust and internally consistent.  If the tenets of Causal Determinism are accepted, it logically follows that the Big Bang (if that was, in fact, the beginning of all activity in the universe) was the originating cause of all symphonies, works of art, and magnificent buildings.  In fact, accepting Causal Determinism as true, and further accepting that the Bog Bang was the first cause, the Big Bang wrote this post and your post, created this website, and is causally responsible for everything that has occurred since the Big Bang -- and in a way that everything that thereafter occurred was inexorable and the only thing that could occur even before it did so.
You may believe that it is ludicrous to imagine such a complex and immovable chain of events, but Albert Einstein not only imagined the same thing, but he contended that he could prove it theoretically, and many other great minds of the past have shared that belief, as exemplified by the following quotes:
	
	
		
		
			“Human beings in their thinking, feeling and acting are not free but are as causally bound as the stars in their motions.” – Albert Einstein
		
		
	 
	
	
		
		
			“There are no accidents in my philosophy. Every effect must have its cause. The past is the cause of the present, and the present will be the cause of the future. All these are endless links in the chain stretching from the finite to the infinite.” – Abraham Lincoln
		
		
	 
	
	
		
		
			“In historical events great men-so called-are but the labels that serve to give a name to an event, and like labels, they have the last possible connection with the event itself. Every action of theirs, that seems to them an act of their own free will, is in an historical sense not free at all, but in bondage to the whole course of previous history, and predestined from all eternity.” – Leo Tolstoy
		
		
	 
	
	
		
		
			“Future is predestined and unchangeable.” – Vivake Pathak
		
		
	 
	
	
		
		
			“The future is certain. It is just not known.” – Johnny Rich
		
		
	 
	
	
		
		
			“The fate of one individual invariably fits the fate of the other and each is the hero of his own drama while simultaneously figuring in a drama foreign to him—this is something that surpasses our powers of comprehension, and can only be conceived as possible by virtue of the most wonderful pre-established harmony.” – Arthur Schopenhauer
		
		
	 
	
	
		
		
			“Things could have been produced by God in no other way, and in no other order than they have been produced.” – Baruch Spinoza  [Note: Spinoza's "god" was the universe, itself, and not the Abrahamic god of his ancestors]
		
		
	 
I also find the following instructive:
	
	
		
		
			“Man is a masterpiece of creation if for no other reason than that, all the weight of evidence for determinism notwithstanding, he believes he has free will.” – Georg Lichtenberg
		
		
	 
	
	
		
		
			“The first dogma which I came to disbelieve was that of free will. It seemed to me that all notions of matter were determined by the laws of dynamics and could not therefore be influenced by human wills.” – Bertrand Russell
		
		
	 
	
	
		
		
			“The deep-rooted belief in the psychic freedom and choice is absolutely not scientific and should give a way to the assertions of determinism, which controls mental life.” – Sigmund Freud
		
		
	 
	
	
		
		
			“Free will is the ability to do gladly that which I must do.” – Carl Jung
		
		
	 
Lastly, one of the best, and most poetic, statements of Determinism can be found in the Rubā‘iyyāt of Omar Khayyám (written in the 12th Century), which contain the following verse:
	
	
		
		
			With Earth’s first Clay They did the Last Man knead,
And there of the Last Harvest sow'd the Seed:
And the first Morning of Creation wrote
What the Last Dawn of Reckoning shall read.
		
		
	 
You end with the following assertion: "Humans do that [i.e., write symphonies, create works of art, and erect magnificent building] by choosing among alternatives." 
If humans do have free will, and are not meat puppets of the universe, then you are 100% correct, and Causal Determinism is a false construct. By the same token, if the universe is truly and entirely deterministic, then your statement (whatever "your" might mean in a deterministic universe) would be false -- albeit compelled by the universe in an ironic form of self-contradiction.
We all know that a computer or robot can be programmed to assert that it “believes” something and even can "feel" something, even though it does not.  How does anyone know that their perceived beliefs and feelings are real and not programmed, imagined or otherwise illusory -- "determined" (or "pre-determined") by antecedent activity of the universe going back to the Big Bang (or beyond).? After all, a person who is truly delusional has faith that he or she has a grip on reality, and has no ability to recognize that the delusion is not real.
In “2001: A Space Odyssey,” the main character, Dave, is interviewed by a BBC reporter about HAL, the super-computer that helps to operate the spaceship. When the reporter asks Dave if he believes that HAL is capable of emotional feelings, Dave responds: "Well, he acts like he has genuine emotions. Um, of course he's programmed that way to make it easier for us to talk to him, but as to whether or not he has real feelings is something I don't think anyone can truthfully answer."
The same may be true of human perception of free will.  If Causal Determinism is true, Free Will is an illusion, as is the very act of perception. If Free Will does, in fact, exist, it exists without regard to whether it is perceived to exist.  And, if Free Will does not exist, the mere fact that it might be perceived to exist does not make it so.
Unfortunately, there is no way to prove whether Causal Determinism is true or false — as I have attempted to explain (or as I have been caused to attempt to explain) at 
Does quantum mechanics undermine hard determinism?  Accordingly, inasmuch as the truth of Causal Determinism precludes the existence of Free Will, the inability to falsify Causal Determinism forecloses the ability to prove the existence of Free Will — as explained at 
Is there really anything as free will?
Notwithstanding my belief in and acceptance of a lack of Free Will, I continue to live my life in the same manner as I lived it before adopting that belief — still seemingly making choices “as if” I had Free Will, and I suppose I will continue to do so unless and until I am caused to act otherwise. In that regard, I note that Albert Einstein is quoted as having said: “I am compelled to act as if free will existed, because if I wish to live in a civilized society I must act responsibly. . . I know that philosophically a murderer is not responsible for his crime, but I prefer not to take tea with him.”