It's nothing crazy about it. Why do you study? To learn. The exams are there to benchmark your progress. If you cheat, everything falls apart for you.

It is possible that when the metric becomes the target(AKA Goodhart's law) cheating can be beneficial but this is failure of the institution because it means you are no longer there to learn.

>Why do you study? To learn.

mature students (25+, at my school) are indeed there to learn. the 18 year olds are mostly there because its what is expected of them, no more.