College students are (usually) legal adults. Universities can't control what they do off campus, even if they have set up the ideal disease spreading prevention regimes on their campuses (spoiler: haha no they haven't done this either). Can't look across MAGA nation and think, "oh, but surely the children will be smarter!"
But, sure, bring 15,000 (or however many) students back to smallish towns and then pretend to be shocked about what happens.