As someone who would've never done this age 10-40, experienced extremely severe trauma at age 40, then started having uncontrollable rage fits age 40-43 (it's mostly subsided now, but I still do get more irritated than I used to) I wouldn't be so quick to judge. I thought the same as you before something happened, but it turns out PTSD is a hellofa drug. It's not something you're able control. I didn't learn my way out of it through maturity, I grinded my way through it losing friends along the way. I have no idea what caused me to stop either, other than just distance from the trauma.