Does it have to obey such laws for it to work?
Yep.
It takes two to tango. Not only must a hypothetical unknown influence be able to affect particles; Particles also need to ba able to be affected by unknown influences. And we now know they cannot be.
Except it really doesn't.
I can crack open any universal simulation and just go about changing numbers on the fields.
If you have access to the simulation you could but it would no longer be a representation of the universe so no longer useful.
The simulation is "a universe", here. Not "a representation of" but "a genuine article".
That seems to by your continuing problem. You consistently confuse models for reality.
Your continuing problem seems to be an inability to look across different contexts.
You have to pay attention to what is meant here by "a universe".
It is merely any self-contained or apparently self-contained system of operational principles.
I am pointing out a GENERAL truth about UNIVERSES, all of them, plural: that all universes are indistinguishable, from the inside, as to whether they are simulated right up until a determinism is observed as being broken.
Imagine for a moment you are a dwarf. You are bound to certain physics which, for the sake of this discussion we will pretend are a little more "rich" than they actually are so as to allow you a great enough complexity of thought to process such ideas as "physics".
Does it have to obey such laws for it to work?
Yep.
It takes two to tango. Not only must a hypothetical unknown influence be able to affect particles; Particles also need to ba able to be affected by unknown influences. And we now know they cannot be.
Except it really doesn't.
I can crack open any universal simulation and just go about changing numbers on the fields.
No "internal physics" necessary there.
The laws of the physics only control things bound by the physical process. Not bound within the physics? Then you can do "whatever", which is only bound by host physics not client physics.
We do not live in a simulation.
Your argument by analogy depends upon your personal mythology, to which nobody has any reason to subscribe - your objection is indistinguishable from a religious objection.
Prove it.