I think you're intentionally using term the abuse, in contrast to the words I used, to be inflammatory.

But yes, I think it's healthy for my children to experience more suffering than I, ceteris paribus, would permit them to experience, if I were omnipotent.

I'm using the word abuse because I am referring to abuse as distinct from the abstract kind of suffering that's impossible to have any opinions for or against because it might include hiking long-distance. ;)

Where does a kid walking up to your kid and saying "That shirt looks dumb on you" once a week fall?

Pretty far north of some of the things that happen in the rougher of our public schools.