Quite apart from the math and science of deterministic physics and probabilistic quantum physics, there's a broader evolutionary question.

Why would we evolve this hallucination that we have free will, if in fact we fundamentally don't? It seems like a lot of effort and metabolic energy on a moment-by-moment basis to maintain the illusion. I guess you could make an argument we're in some sort of simulation the maker of which required this illusion to be present for reasons of their own.

But the conscious awareness of our moment-by-moment availability of choice is one of the most difficult things to deny even if you're incredibly skeptical about everything else you can observe through the senses (a la descartes).