I guess it's sort of a cool art project? But it doesn't seem that useful as a data point. Mostly because the artwork is likely affected by the expected outcome more so than the actual experience, and that experiences can vary wildly even with the same substance, and varies wildly amongst people.
I.e. from this guy's self portrait with absinth you'd imagine that it makes you sad, but that's never been my experience with it.
More than anything it's a nice showcase of the artist's stylistic range.
Agreed, and more generally, how do you say attribute different artistic stylings as due to a drug vs. all other factors (e.g., expectations of the drug, mood, social setting, etc.). I would imagine this has been studied in perceptual psychology (or some related field) in a more controlled fashion.
I.e. from this guy's self portrait with absinth you'd imagine that it makes you sad, but that's never been my experience with it.
More than anything it's a nice showcase of the artist's stylistic range.