Alongside so much else, these fuckers aren't taught the concept of trauma well. The more informed of them think it's only debilitating trauma that keeps you awake every night and anything less just isn't trauma. Others basically think it's some mystical debuff.
There's also something to be said about the barrage of assertions regarding what their adolescent self would feel or whether what teens want and what they need are the same thing. Children regularly hurl themselves into situations that might harm our traumatise them, their willingness isn't reason enough to facilitate that.