If every system you describe—quantum gates, neurons, circuits—can be fully accounted for in terms of structure, function, and causal relations, then why does anything need to feel like something from the inside at all
Because of locality and the existence of those self-same phenomena. It sounds almost stupid and trite like all the best, prettiest proofs in math, though: if something is undergoing a local phenomena, if the subject experiences the phenomena, there will be some report, should that phenomena produce a report, expressing some nature of that phenomena to an outside observer, but the perspective of the immediate observers to the interaction is relatively different.
The existence of "phenomenal experience" is a prediction of relativity and locality with a fixed speed of light.
I appreciate the creative direction you’re going, but I don’t think this answers the core issue.
You’re talking about local phenomena, reportability, and relative perspectives—which all describe how information or signals propagate through spacetime. But none of that explains why any of it should be accompanied by subjective experience.
Relativity and locality constrain the structure of interactions, sure—but they don’t predict that anything should feel like anything. A camera or sensor also responds to local phenomena and produces reports—but we don’t say it’s conscious. So the real question remains:
Why does any structure—local or not, complex or not—give rise to the intrinsic presence of experience at all? Why isn’t the entire system just a perfectly silent, unconscious machine?
Unless you’re willing to say that subjective experience is just what structure looks like from the inside—which starts to sound a lot like idealism—it seems like you’re describing behavior, not explaining consciousness.
NHC