I disagree. There is no such thing as a societal oversupply of educated people. There might be a market oversupply, but a well educated society is a stupid thing to avoid. I would also argue that we are seeing an oversupply of people with education credentials, rather than an education. Even in high end universities in China cheating is rampant (this isn't isolated to China, but my experience is that Chinese students are VERY open about it). For many people in University, the goal isn't to get an education, it is to get a degree.

As to my own experience: I am, according to most standardized tests, very apt at quantitative reasoning, but I never progressed far in math in school. Why? because I was placed on the standard track in math in a public school with a bunch of students who didn't care, and teachers who didn't have time to care, and to be honest, the attitude rubbed off. I once got in trouble because I programmed a python script to do my problem sets when I was 13 because it was faster than doing it by hand for me. In retrospect, that form of "cheating" was a sign that my teachers should have picked up on.

Quite simply, I never had access to a good math instructor throughout my schooling.

Now, decades later, I am intensely interested in a lot of subjects that require a background in math that I don't have, and I am becoming interested in Math for Math's sake. I have been using open access textbooks, and an AI assistant of my own creation to help me learn.