It's a very good question. My son was going off the rails in several ways before he became a witness. We his parents were trying to help and guide him but he wasn't listening. Then he got in with the witnesses and to be honest they did sort him out.
As black sheep says the same help would have been available elsewhere, but he chose this route.
He is now a much more resposable adult, but on the negative side he is going round people's doors telling them they will die if they don't change their ways. Also he does not have the ability to reason things out for himself, and of course he keeps his distance from the family because of the JW aversion to certain celebrations.
So there is good and bad. But to be fair, he did need something to help him, it's just a shame it had to be this religion.