My initial reaction is to agree that it was self inflicted, technically it was but its also not that cut-and-dried. We all eat and many of us know what it feels like to want to overeat yet we resist the temptation. This makes us feel we are able to say with some certainty that hers was a moral failing. but I've also been a drug addict most of my adult life and true hardcore addictive behavior isn't something you can deal with, with a little willpower. At one point I'm sure this woman had it in her to stop had she put for the effort but after a certain point signals to the primitive part of your brain mix up addictive behavior with other critical functions like survival, fear, sexual feelings etc and it turns from habit into a base need. At the time of her death she was probably no less addicted than the worst crack or heroin addict.
hopefully she has some peace now.