> So just because we feel conscious—just because strong feelings of consciousness, of "me-being-here"-ness, are written into the substrate of our brains—why should that tell us anything?

It's a fact about the universe that it feels a certain way to have a certain "brain state" - just like it's a fact about the universe that certain arrangements of ink and cellulose molecules comprise a piece of paper with a message written on it.

That fits perfectly well into a fully materialistic view of the universe. Where it starts to feel spooky to me is the question of whether thoughts themselves could have some sort of causal effect on the brain. Could a person with a healthy brain be lying safely in bed and "think themselves" into something "unhealthy?" Could I have a "realization" that somehow destabilizes my mind? It seems at least plausible that this can and does happen.

Maybe the conscious experience is pure side-effect - not causal at all. But even if the ultimate "truth" of that series of events is "a series of chemical reactions occurred which caused a long term destabilization of that individual's conscious experience," it feels incomplete somehow to try to describe that event without reference to the experiential component of it.

Whether we posit spooky downward causation or stick to pure materialism, there still seems to be a series of experiential phenomena in our universe which our current scientific approach seems unable to touch. That's not to say that we never could understand consciousness in purely material terms or that we could never devise experiments that help us describe it - it just seems like a big gap in our understanding of nature to me.