Addiction is a form of mental illness, and watching talented, decent people self-destruct and succumb to mental illness is very sad. PSH did a lengthy interview with 60 Minutes in 2006 discussing his early struggles with addiction here.
Fortunately he did get help in rehab and survived to see many of his dreams come true. Here he was at the 2006 Oscars receiving best actor for Capote and thanking his mom for her support and dedication as a single parent. Here is a direct link.
Just last month I stumbled upon the movie “Thanks for sharing” (on Rogers on Demand) which I thought offers a very mature, insightful, hopeful but realistic look at the reality of addiction in all its various forms. Here is the trailer.