Growth requires heartbreak.

I think that experiencing pain aids in self-discovery and life navigation. I've talked to some older people about how important those experiences are for children, teens, and young adults to discover who they are.

If you shield someone from the outside world and then send them out into the real world, they won't be able to navigate it because all you did was protect them. Certain experiences during adolescence are acceptable; it all depends on the available support and direction.