I watched the movie. I had some idea of what goes on.The movie left little doubt and instead further confirmed my suspicions. I think Dave was also into the black arts which the movie doesn't comment on, but I remember Dave saying as much on another interview I had watched.
I think I would have been more surprised if I had seen that Dave was an intent reader, enjoyed quiet walks and intellectual conversations about philosophy . He simply took the same route that so many others took who were doing the same or similar things. Junk was available, he seen doing junk as what rock stars do ...and having a pretty big ego decided to try and do it better than anyone else. Once you get hooked, you're hooked...they call it hooked for a reason...you would sell your grandmother to get a fix.
In their case they sold the bands gear numerous times.If anything, I think he was enabled to be what he became, I mean...the very environment is encouraging to the behavior. In some cases your roadies and record company execs can be your drug pimps. If they don't get them the stuff, they won't play the gig. Nothing is worse than having a heroin addict who needs a fix right before a concert...better find some smack and find it fast....
If David would have died it would have been a nice write up in Rolling Stone magazine. He would have been forever a metal guitar god and life would have gone on...the record company would have still sold albums long after he died.
In those circles I think it was a mutual consensual thing and everyone is in it for themselves.The rock star- Girls, drugs, notoriety. The record company/promoter-Lots of green money. Kind of a cohabitation of destruction. The cycle goes on...look at some of the messed up musicians at the top today.