That would be Descartes, right? I think I am more of a sophist if anything. Of course the brain interprets external stimuli such as sound waves, but maybe this information is stored in a kind of cloud as used in computing to store files, and are then downloaded when given the correct stimulus. Maybe some cosmic intelligence knows everything that is going to happen next, and plays reality out in sequence. Maybe some aspects of our mind-function are shared with the cosmic cloud, and can only operate in tandem.
Thus far I've always sided with Occam's Razor when it comes to consciousness. I'll concede that there is still a lot that is not known about how the brain and consciousness works but from what is known from study and experiment, has only been discovered within the past ~80 years. So this has not been an area of experimental inquiry for very long at all.
There's practically no limitations on what "could be" conceptually, when it comes to consciousness. I've presented the idea before that there could be some alien controlling all my thoughts and essentially making me hallucinate this world and this experience that I'm currently having of the internet, such an alien is undetectable to any current means we have to detect it, whose to say this is wrong? There's various other ideas suggesting there could be simulated realities and stuff as well. I think all of these types of ideas inherently shield themselves from investigation or experimentation, because the object that we project control of our minds is beyond our grasp in any way from reliable study.
So to an extent, it probably comes down to what a person values, if I take Magic Mushrooms do I baselessly think my mind is somehow connecting to a consciousness cloud, and then presumably a different part of the consciousness cloud causing me to get moving patterns and stuff just because I can conjure it up ? or is that the Mushrooms I ate are being metabolized, then effecting my 5ht2a receptors (which is known) and then eventually this alteration is likely effecting my V1 and V3 visual receptors and changing their regular functioning effecting my vision. (which afaik I'm hypothesizing this connection). I realize you are suggesting a kind of synthesis of the 2 notions here but what I'm getting at is at what point do we turn to the "magical" reasoning if there is a definite trajectory of understanding with the physical reasoning but it has yet to be fully verified?
It seems to me that reducing the mind to the physical is almost a scary thing for some, I'm not quite sure why this is... maybe it's the degree of responsibility this leaves the individual with ? maybe it's isolating in a sense ? maybe there's a diminished sense of control or seeming lack of free will ? but... It's like as if you conceptualizing that you cannot wake up on Jupiter tomorrow is more difficult than actually going through the process and understanding why your body could not wake up on Jupiter tomorrow.
Granted the brain is finite in size and sitting in our skulls which may make it seem somewhat insignificant, but I think it's difficult to comprehend a lot of stuff about it, such as the fact that if I were to count numbers out loud each second for the rest of my life, that I would die before I reach the number of neurons in the human brain, it would actually require several lifetimes.