It may be reductive but that doesn't make it incorrect. I would certainly agree that creating and appreciating art are highly emergent phenomena in humans (as is for example humour) but that doesn't mean I don't think they're rooted in fitness functions and our evolved brains desire for approval from our tribal peer group.

Reductive arguments may not give us an immediate forward path to reproducing these emergent phenomena in artificial brains, but it's also the case that emergent phenomena are by definition impossible to predict - I don't think anyone predicted the current behaviours of LLMs for example.