"why don't you just get stoned and create?"
because you can't create anything when you're stoned - it is a condition that is antithetical to creative expression.
creativity requires clear thinking through the proper observation of sobriety.
what inebriation is good for is numbing the pain of repetitive tasks. it is good for low wage workers that just need something to help them through the day, or people that can't find a purpose in a system that is designed to make it impossible to find one.
but, nobody uses drugs to make music - or at least not to make music worth listening to.
and, perhaps you might want to actually listen to the music i create to hear how distant it is from marijuana culture. it's basically classical music.