I feel that “addiction” is a by-product of the Hollywood hanger-on lifestyle in this business. If every wealthy actor, singer, performer is “addicted” then they constantly need these rehab stays and “treatment” just like they need agents and business managers. It’s just another ploy to take advantage of people who are good at playing pretend but horrible at every other aspect of life. Why is only roughly 10% of the population at large in 12-step programs but nearly half of Hollywood is? It’s also a community more replete with sex “addicts,” drug addicts and other addictions. Replacing one addiction with an addiction to “treatment” is just another way of taking advantage of these sad sack human beings who refuse to take responsibility for their own actions. No matter how talented it all ends the same way... even for talents like Whitney Houston and Michael Jackson and downright genius such as Prince.
Decades ago (and maybe before Scientology took hold in Hollywood) I heard that some people (writers, agents, actors...) would go into AA/rehab to get close to some A-list talent and network/get connected.
Some of the Hollywood fallout rate is long established behavior. “you’re only as good as your last movie”.
I caught part of Whatever Happened To Baby Jane on tv this week (had never seen it before) and there is alcoholism in it too from an aging actress. That was made in the early 60s.