I'm a physicist and musician, though I'm certainly not one of the greats in either area. Musicians have their reputation for dealing with addictions, though I've avoided them myself.

But I've read that the stereotype of the musician needing the junk in order to be creative, is a myth. When people study the actual timelines, they've found that the great artists did their best work when they were relatively clean, and that the addictions detracted from their work.