Its an impromtu jam on the side of a hill , I dont really mind if he's off his chops on this or that .
A lot of other famous musicians from that period were on the junk too , the Stones went to the trouble of documenting the debauchery in cocksucker blues , but then witheld the movie from public view because they were afraid of the effect it might have. A lot of great albums were made 'high' , true enough what you say though over the longer term creativity and drive suffers as the junk gets its claws in .