She is killing herself with drugs because she's surrounded by sympathisers like you. "I'm sorry you are such a mess, it's not your fault. It's the drug. I am sooo sorry."
If from the beginning, there are people around her tell to pull herself together, get help, etc. she may be not be in a mess like this.
And please don't blame her early fame and fortune. Simple example, Justin Timberlake and Christina Aguilera are not as mess up like her. It's really what's the path you choose for yourself.
I see... you, the person who was whining about personal responsibility have now decided that it isn't Britney's fault, but rather "people like me" who sympathise with her.
You seem to think that me telling people to stop criticising her is in someway the same as encouraging her to take drugs. The issue we were discussing was not what is the best way for her to get off drugs, we were discussing how she should be treated by people in the general public.
How do you know what people around her tell her behind closed doors? You don't know what people say to her. It makes just as much sense for me to argue that if only people close to her had been sympathetic instead of harsh like you then none of this would have happened.
She made bad choices. She's ridiculed for them. I don't see how that is a good thing and i certainly don't see why people can't feel sorry for her..