A very large percentage aren't there to uphold some notion of academic integrity. They're there to hand over wads of cash and do whatever else they need to do t

A very large percentage aren't there to uphold some notion of academic integrity. They're there to hand over wads of cash and do whatever else they need to do to get the credentials that they need to get some particular job (or rather, any white-collar job these day). Many of them don't care about the subject - only a small subset of students actually end up in the fields they study - even in STEM, many will go to finance if they can. The ones at the higher levels looking for that golden job stand to lose lifetime millions in earning (and for some, a green card) if they don't do well. The ones just looking for any job just need to scrape through. They don't come from the academic system, they won't stay there, they don't respect it or even want to be there and have no relationship with the institution or its staff other than a begrudging financial one and an adversarial educational one. Universities for their part were handed a poisoned chalice by governments demanding Shiny Modern Economy things like "50% of people should have degrees". Comply, and make scads of cash by gradually selling off credibility over decades. Refuse and be crushed into obscurity by those who take the deal (and by the way, all these vocational schools are universities now).