Musicians making music without sound or sight are forced into such a position by necessity; forced to embrace their instruments as guides as much as tools. A new sense develops in them - that of intimacy - leading to a highly personal relationship with their music.
Marijuana was not widely known in the 1920’s, but for jazz musicians, it was part of their lifestyle. Marijuana sustained their energy in a way alcohol couldn't, and provoked experimental improvisation that captivated audiences...
Does an artist really have to suffer to make great art? This common theory has developed over time due to the sheer number of tortured artists that the music industry in particular, has to answer for. But upon closer examination, that perception can be deceiving.