The point I am making is that in a physically pre determined system there is no mechanism for choice to exist.
Only if you dishonestly redefined the word "choice" to
mean "god-magic intervention". Here in the real world, choices are being made by humans, animals, and machines all the time.
The physically deterministic universe existed long before the human concepts of logic, state of mind or personality came into existence, so from the secular point of view, the physically deterministic universe is the foundation of everything which exists, so everything of this universe must be entirely pre determined by the physically controlled events in this universe.
It is not actually clear if the universe is entirely deterministic. That aside, this would be true in any orderly system at all. Within the physical universe a sophisticated choice making entity (like animals, including humans) would have an initial state, gain experiences, and have a current state of mind. When a choice has to be made those factors, together with the circumstance determine the choice.
If we imagine a non-material soul,
exactly the same logic must apply (it would have an initial state, gain experiences, and have a current state of mind. When a choice has to be made those factors, together with the circumstance determine the choice), if it doesn't, you are, by definition, introducing things that happen for no reason, which
means random.
Both a material brain and any logically self-consistent, non-material soul you may postulate, must either be
deterministic systems or have an element of randomness.
That's why the physical makes no difference to the logic.
To facilitate choice in such a system would require deliberate intervention from outside the physically pre determined nature of this material universe.
Anything that does intervene is subject to the same logic I outlined above. You cannot have a choice being made that is not fully determined by its logical antecedents unless it involves randomness.
And once gain your ran away from addressing the logic:
If every single factor that may affect a choice (including the state of mind of the chooser, all of her nature, nurture, and experience) do not result in only one possible choice, then any remaining choice can have no basis at all, and a choice made for no reason, is random.
How about you at least try to say what you think is wrong with that?