Look, I agree with the sibling that the school needs to do something about cheating.

Individual instructors should do something about it, even.

The fact that there is no feedback loop causing instructors to do this is a real problem.

If there were ever a stats page showing results in your compilers course were uncorrelated with understanding of compilers on a proctored exit exam you bet people would change or be fired.

So in a way, I blame the poor response on the systematic factors.