There were always two types of people at college, those who want to learn things and those who want a certificate so they can get a better job. It was always pretty easy to distinguish the two.
I think the second group has gotten more and more prevalent over the years, and I think it has to do with how college was pushed on everyone for at least as long as I have been alive. They told everyone "go to college to get a good job!", and so a lot of people go to college who have no desire to be there, they just want to get a good job. In fact, even worse, they tell people "You need a college degree to get a good job!" They don't say you need to learn anything, just that you need a degree.
Well, if the degree is the important thing, it doesn't matter how you get it. Cheating is just a way to get the thing you want.
This is a classic example of Goodhart's Law: We created college degrees as a way to measure learning, but once people realized the college degree is what people look for, it stopped becoming a measure for learning.
You're also 17 or 18 when you go. We were children. Alot of classes also end up sucking so you just power through it and get jaded about the whole experience.