So you are asking the big Why! — MoK
It wasn't a big why. It was admittance of the intrinsic unintelligibly of the world. And what was considered problematic by Descartes, Newton, Huygens, Locke, etc., was motion. That's way simpler that consciousness.
But it is unintelligible to us. We simply proceed to do science through theories, and we have dropped the expectation that the world will ever make (intuitive) sense to us. And as with motion, so with consciousness, as John Locke (certainly no pushover) astutely observed:
"Whether Matter may not be made by God to think is more than man can know. For I see no contradiction in it, that the first Eternal thinking Being...should, if he pleased, give to certain systems of created senseless matter, put together as he thinks fit, some degrees of sense, perception, and thought... For, since we must allow He has annexed effects to motion which we can no way conceive motion able to produce, what reason have we to conclude that He could not order them as well to be produced in a subject we cannot conceive capable of them, as well as in a subject we cannot conceive the motion of matter can any way operate upon?"
Substitute "God" for "Nature."
We don't understand why gravity works as it does, but we know that it does work without material contact, through Newton's theory of gravitation.
We don't understand why matter could think, but we know that thinking depends on matter, as shown by the fact that no person lacking a brain can think.
Bohmian interpretation is paradox-free so it is the correct interpretation. — MoK
I suspect some physicists might disagree. But we can put that aside.
Then, the important problem is how we could have mental experiences where therein options are real while the the physical processes are deterministic. I think the solution to this problem is that we are dealing with neural processes. So I think the result of neural processes in the brain can lead to the existence of options as mental phenomena. Think of a situation in which you are in a maze. Although the neural processes are deterministic in your brain they can give rise to a mental representation in which options are real when you reach a fork. — MoK
But how can you say physical processes are deterministic? Some show regularity, others show randomness, and we see exceptions to rules quite frequently.
Free will is the ability to do or not to do something. That so called "physical processes" happen before we are aware of them only shows that most of our mental activity happens at an unconscious level, what we decide to do with that, is up to us. We can act on an urge or not.
No, I think we already agree that experience which is a mental phenomenon can not be considered to be physical. We also agree that the mental has causal power as well. That is all I need to make my argument. — MoK
You have
asserted that the mental cannot be physical. There is no argument given as to why this has to be so. It's a semantic argument that "the mental cannot be physical, because mental phenomena are not physical phenomena".
But that does not solve a simple question: why can't mental stuff be physical stuff?
Seeing and hearing are
extremely different from each other, but we don't assume these are metaphysically distinct things. We treat them as different sensations, even though, again, they are very different. So why should we assume that the mental is more radically different from the physical than seeing is from hearing?
If we can't give a reason why, then we are likely carving out a mistaken distinction.