And we all know the best way to learn about how to deal with people is putting them in a group of incompatible people in a high-stress, prison-like environment. What could possibly go wrong?
As long as high schools are facilities that push some people to extreme actions I think the 'social education' you would get there is too expensive for society as a whole.
I find that your first paragraph is very negative and has an insular posture.
Dealing and managing with other people who are incompatible with your ethics and morality is an important skill to learn. Not only does it help you learn asseriveness and diplomacy it also allows one to gain an insight into your own personal bias and teaches you how to respond and not react. A lot of grown, so called 'adults' still need to learn this skill set from my observations in day to day life.
In a perfect world that's what school teaches you. What gets you through high school in a lot of social circumstances is nothing close to any sort of diplomatic behaviour or assertiveness. The louder more aggressive person usually came out on top. Maybe a lot of people here went to some private school where somehow logic, analytical ability and being polite is what got you through but that certainly doesn't describe where I went and can't imagine a public school being this way.
I love how you bring up diplomacy. It brings up all kinds of associations, good old Clausewitz not being the least of them when you consider what else happens at schools.
As long as high schools are facilities that push some people to extreme actions I think the 'social education' you would get there is too expensive for society as a whole.