I'm sure that's true for some kids. With my sister nothing worked. My parents tried everything and everyone on earth to help her. Nothing worked. In fact, as I type...she is with a man who prostitutes himself for drug money and beats her. She is once again on heroin. Both of her children are being raised by other people. She had every opportunity, every therapy, every parenting tool. Some kids, just can't and won't be helped. Then you have the kids who are born to junkies, abused, live in poverty, have no opportunities. They somehow manage to turn it around despite the odds, and do something meaningful with their lives.
It's a crapshoot. Parenting only does so much, on both sides of the coin.