I think I disagree that no one has empathy for trauma; many of the characters, Harry included, explicitly empathize with people (I'm thinking Harry with Luna here or the Trio with Neville, etc).

I think you are absolutely right that the Wizarding World relies on this pull yourself up by your own bootstraps mentality that allows for the comforting of friends but not a concerted, systematic effort (like mental health care) to deal with the fall out of trauma.

I also think their whole world view is skewed re: pain. I've been noticing this reread just how many terribly painful magical accidents and jinxes and etc they all endure, and everybody just acts like that's normal and fine and not nightmare fuel. I think the idea that you can splinch your leg off and then reattach it just fine or regrow all the bones in your arm just dandy or whatever makes them all just think that only those things which cannot be surmounted like death or insanity amount to much.

Me? I think I'd forgo the chance to learn magic if it meant regular and excruciating pain.

Just once I'd like to read the fic where people are traumatized by the genuinely traumatizing magic accidents that happen to them as children.