I know people who have left the Witnesses and they're lives are in shambles. They needed structure and without it they are lost. I know people who have left and they are fine. Strictly speaking from my own extended family: all the ones that have left are all screwed up.
It's called self-fulfilling prophesy. Of course, if someone is browbeat their whole life, told they are sinful, imperfect scum deserving of death, (especially if they leave), in addition to being unprepared for real life, with no education, no prospects for improvement, and also believe it is wrong to want to improve their life... Isn't it kind of obvious someone in this situation would be set up to fail? Duh...
d4g