Reverse phrasing of the question: “Why would we assume that the mental states and processes evolved to deal with the ancestral environment are the optimal ones for creating art?”
While this is an interesting lens through which to view the original question, it is not quite a rephrasing. Suboptimality of our typical mental states for art (or any given task) provides the possibility of improvement, doesn’t tell us whether any given drug* will move us to somewhere more optimal.
(*or even any hypothetical drug—it could conceivably take radical rewiring to improve on our typical performance, although I would find this result surprising.)
Reverse phrasing of the question: “Why would we assume that the mental states and processes evolved to deal with the ancestral environment are the optimal ones for creating art?”
While this is an interesting lens through which to view the original question, it is not quite a rephrasing. Suboptimality of our typical mental states for art (or any given task) provides the possibility of improvement, doesn’t tell us whether any given drug* will move us to somewhere more optimal.
(*or even any hypothetical drug—it could conceivably take radical rewiring to improve on our typical performance, although I would find this result surprising.)