'Human' is a broad term. It is not the toenails or the hair follicles of a human that sift information in order to meet the needs and wants of a human, but specifically the function and role of neural networks.
But there might be more than just neural networks dealing with information as studies are starting to show. You certainty is going against evidence.
Your objection is too vague...what exactly is that gathers and processes information other than the central nervous system with its central processor, the brain? Of course the brain is composed of many structures, including your microtubules. But as I've pointed, microtubules are not information processors or decision makers...at best carriers of information, but that is not proven.
It is you who is trying to build a case without evidence to support it, even worse, with the evidence going against you.
The true thing is the decisions that we experience. The mechanics of the decision is everything that is physically necessary for decisions. We don't know for sure what is physically necessary or what functions are necessary. Functionalism is far from proven and may be impossible to prove.
You don't experience anything without a functioning information processor, a brain. We know that s certainly as anything can be certain.
A knock on the head immediately effects your experience. Apply general anesthetic and your conscious experience is switched off; you are switched off, progressive memory failure disintegrates both self and conscious experience, etc, etc...
No, it depends where you are in time. If the decision has already been made, how can it be different? Although it may be true that it could have been different.
Information state being what it is in any given moment in time, a given condition cannot be in state x and in state y, consequently there is no alternative action possible in that moment in time.
If you are lying down, you cannot be standing up at the same time and so on...which, however more intricate and complex a brain, applies equally to brain state. Any given synapses cannot be both closed open at the same time, a receptor cannot be both vacant and occupied at the same time. The decision that is made is the only possible decision in that moment in time, perhaps to be regretted a moment later.
Plus you have no conscious input into the processing. You have no access to the process. You cannot alter neural processing by an act of will. You as conscious self are not the master of brain activity, but the product.
Your notion of of free will is an illusion. Be happy with intelligence and rational will.