The idea that the creative endeavor and mind-altering substances are entwined is one of the great pop-intellectual myths of our time. Substance abusing writers are just substance abusers — common garden variety drunks and druggies, in other words. Any claims that the drugs and alcohol are necessary to dull a finer sensibility are just the usual self-serving bullshit. I've heard alcoholic snowplow drivers make the same claim, that they drink to still the demons.