Again, that is your theory. Just because you've created it using the primitives of materialist science doesn't mean it's true or that it's more likely than another theory. The fact is there's no scientific basis for believing what you've said. There just isn't.

If it feels like there's a scientific basis for what you're saying, that's because you're invoking the metaphysical principle of strict materialism, which is a common (though not inherently valid) way of thinking about science, and if that were true then yes, something like your theory would have to be true.

But be clear - that is not something proven by science, it is an axiom that is far from obviously true or universally accepted.

It may also feel that your theory should be true because so much about how the body and brain works is, I agree, materialist in nature, so why not hypothesize that everything is materialist? But that is very much a hypothesis and an intuition, not something that is scientifically proven or logically forced. And, as you say, intuition can be flawed.