Personally, I think everyone should go through at least one crisis when they are adolescents so they know how to handle things, or at least what traits they need to get under control. If you never experience something going wrong, when you can still bounce back, you will never survive "rolling snake eyes" and getting hit by a bad event.

Then again, some training on coping skills and then created scenarios where people must then use said coping skills (e.g. get left in the wild for 2 days with some food, a tent and the ability to chicken out on the condition they retake the course) would probably work as well.