A common justification for group projects was, "you have to learn how to work with people, even people who will not work." Yeah no, that's not the case. People get filtered through a much finer sieve when they're older.
People discount school rituals, but they happen a lot. Pop quizzes happen all the time within my career. You don't always get to say, "I'll get back to you" as much as we all wish that was true.