The school doesn't prepare kids for this. By most measures it does a rather poor job. There's a reason they say "A" grade students work for "B" grade managers who work in companies started by "C" grade students.

Other commenters have said it, but the social behavior kids are exposed to in schools doesn't match much with the "real" world. The way problematic people are handled is quite different. As are the metrics of what constitutes success.