Well, yes, but I have sympathy for people, because I am human.
I don't know when her drug use started, but addictions are really screwed up. I don't condone the use of drugs, ever, but I understand that she had depression and a magnitude of other issues. Issues + money + fame usually equals.. DRUGS!
Once you're in the depths of an addiction, it's hard to get out.
I sympathize with her, because I have seen many-a-people in my life struggle with mental health issues and drug abuse, and it's not always as black and white as you're making it seem.