Socialization is important, on that we agree. Socialization at school is not always positive or even effective. There are many ways to socialize and jamming people of the same age in a room for 6-7 hours at a time is far less effective, in my opinion, than being part of extracurricular programs, clubs, etc that often mingle kids of different ages, backgrounds, neighbourhoods, and cultures far better than any school.

I found that school is an effective way for people to be pigeonholed with labels and expectations that make it more difficult for people to explore and change. Once labelled the class clown, or the athlete, or the brainiac, or whatever, it is very hard to do or try other things so long as you are in a fixed environment. This is why, in my opinion, going to college or university is such a profound life event for people - suddenly new environments and opportunities to explore being something other than your fixed adolescent self.