Earlier quoted context omitted.
I've been split on this. On the one hand it is a bit unpleasant and can be traumatizing, and we tend to shy away from unpleasant things, but on the other hand lots of generations grew up on Grimm's Fairy Tales and Hans Christian Andersen fairy tales and learned a bit about how difficult life can be and the consequences of moral failings or lack of hard work. It is important to prepare children for the fact that life…
Life will give those hard lessons out for free - why build a curriculum for it?
That's kind of the main reason we started to write stuff down, to learn things from the past through other's experiences, so that you don't have to feel alone going through every traumatising events as if you were the first human to do so.
We have empathy, better use it than wait for the hardest part of life to "give us a lesson", most of the really hard parts only happen once so you won't learn much, but you'll suffer a lot.