Why materialists are predominantly materialists

[Angrboda]

You're assuming your conclusion that brain function and experience are distinct.  If they are not, then there may come a day when I can "poke the redness in your brain."

I don't know what poking a color would even mean.  However, if you did do that, it wouldn't be with a pin-- it would be with a virtual pin, perhaps-- the stimulated simulation of a pin in the imagination.

You cannot equate things which must be interacted with in different ways.

This is simply an abuse of Leibniz' law. That they do not appear to be interacting in the same way is no evidence that they are different. This is simply a philosophical maneuver. If experiences like redness do occur in the brain, they are a result of being 'poked' by the right nerve impulses. That I poke something with the impulse from a probe rather than an impulse from a nerve is a difference without a difference. You seem to be making an abstruse argument that things happen in your subjective awareness because of non-physical events. You are simply assuming your conclusion again.