So all the stars with drug addictions, dead by overdose, or anorexia are not proof enough.
I don't think they're proof of anything. Lots of non-stars have drug addictions, die of overdose, or have anorexia.
Would you consider those non-stars addicts as having normal lives? There is a problem if these people who had no previous history of substance abuse gravitate towards it to deal with their issues, what's worse the drugs are readily available to them. Sure, there are a lot of non-star addicts but they are spread out trough the world and their reason for consumption are personal. To see so many people do that around a single place can't be just attributed to them, the environment has an effect on people. Much like if a wrongly convicted felon might turn into an actual felon inside prison, stars react to Hollywood.