As someone who gained an addiction to pain killers following an extensive shoulder surgery, this is pretty much the case. It's very possible I'll never touch another pain killer as long as I live, and haven't in over three years. But I'll always be an addict because my predisposition to being able to be addicted to pain killers will never go away. On the other hand, I could drink as much alcohol as I want, and then stop cold turkey with no issues, aside from physical withdrawals. And that's because due to my "makeup" for lack of a better term, I've never been or will be an addict for alcohol.
I'm mentioning this because there's tons of people who'd likely take the stance of "oh come on James, you're rich, get your shit together". And that's because they have no idea what it's like to be on the other side of the fence.