Isn't every 70s/80s/90s movie about a group of ragtag underdogs successful because of the "if they hate me they won't have time to hate each other" heel-by-des

Isn't every 70s/80s/90s movie about a group of ragtag underdogs successful because of the "if they hate me they won't have time to hate each other" heel-by-design coach? Sounds like this teacher was just applying the Hollywood model. He's probably sitting at home right now like, "Well shit, that didn't work."