I'm no chemist and despise "art," but this seems dumb. This is not legal. It's not safe. It's completely irresponsible. How bad of an artist do you have to be to say "hey, maybe this would look better if I was stoned off my ***?"
So what if it's not safe? No decent artist gives a **** what's safe. They care about art. And if you have any appreciation for any form of art, if any literature or music or painting has ever affected you in any way, then you don't care about safety any more than they do.
There a lot of different way to come about great art, and not a single one of them is safe. You don't come at the human experience honestly by being safe. You don't overcome the white noise inherent to re-translation by being safe. You live with your dial set to 11, and you develop a thick hide.
The best things I've ever written were the product of the most extreme danger I've ever been in. Crisis and pain and unrequited love and intense empathy and a belly-ripping sense of injustice - none of which are in any way safe - are how you get there. Writer's block and all its artistic cousins are a product of too much safety and having nothing pushing at your back. "I can't write because I'm not mad enough," said a writer I admire.
And irresponsible? How? In what way is it irresponsible to simply take a drug? It's a tool he is using to convey an idea. What is irresponsible about it? And even if it were, what does that matter? What does that have to do with the purpose of the project? How is being "responsible" a central tenant of artistic ideas?
If that is what you got out of this, you're missing the point completely. The point is not to make his work "better." The point is to see the character of the drug through the lens of his personality, and how it affects it. Given his social issue bent, and the fact that most of these drugs were legal prescription drugs, I think it makes a strong statement, whatever you think of the quality of the art itself.
I think it's interesting his darkest works are on anti-psychotics. His most vibrant and expressive ones are on uppers. We feed these things to children who have never even seen a proper psychiatrist.
If you all you have to say is, "That guy took drugs! Drugs bad!" you're missing the point.