It's a funny thing about dope and jazz musicians; most people think that somehow the dope helps them to become fantastic musicians. I don't know how they can think that, when the musicians themselves will tell you otherwise. "Bird" was a "junky" before he became a musician, and he told other musicians not to do what he was doing. "Lady Day" would have been a "junky" if she never sang one note because of the gigantic mental problems that were caused by incidents in her childhood.
If you have read books related to all the different reasons people use dope, you would know that none of the reasons say becoming a jazz musician will entice you into using heroin, and make you a dope addict.
Most of the jazz musicians who became junkies, would be junkies if they never blew a horn.
Now that heroin addiction is a nation wide problem, maybe people will discover there's a better way to solve that problem, than incarceration.
Enjoy the music.