I started going to Catholic church in college, against my parents' wishes. I realized that everyone does have problems. But that high school support group was the classic where... idk a nice way to say this, kids self-diagnosed mental problems to feel special. It wasn't about self-improvement.
It seems to work for WASP. Superiority (or I guess family pride) is also big where my parents are from, Iraq and Iran. But my parents didn't take it in moderation, so the outcome wasn't good in the end for them.
they do not have to do that in school. My (home educated) kids did lots of classes and activities where they met other kids. A lot of schools tell kids "you are not here to socialise!" and have strict rules about what you do when which also limits interaction (at least here in the UK)>