Also agree with the idea of protecting them from harm: I think they are a bit too mollycoddled and wrapped upon cotton wool and not given the skills to over come things:
Teaching children they may not be the best at maths, but it's ok;
Bullying is an interesting one here: some children are quite inherently nasty, and even if the school is aware, they often can't control the snidey little remarks made, totally : so, if someone is basically being bullied, they are going to have to learn, we need to to stand up for themselves, not let it get to them, etc etc, as part of the coping strategy.
Teaching kids to cope: with the disappointments, not getting that job/uni place/grade; being dumped.
Those are very important lessons that need to be taught too. And if taught well, they can at least make the depression or anxiety not quite so bad.
Parents are closer to their children and more internet savy than they once were, more open, I think.