If the MOOCs from prestige universities use bad teaching methods that cause people to think they can’t learn math, then the MOOCs are harmful.
The MOOCs are like Bain Capital. They want a quick turnaround. The MOOCs want to expropriate the built up lesson plans of prestige universities. But what if most of those are bad?
Harvard Math 55 is an example of a university course that just throws terminology without sufficient examples at students. Most students don’t get it.
Advanced math textbooks have few examples and don’t explain the ones they have very well. They always interrupt an explanation to make it a problem. Then they say doing problems is how you learn.
They don’t do a complete problem solution down to the smallest details. Instead, those are just spun off as more problems.
If there were resources that did the small steps laid out in detail, it would matter less. But those tend to exist less and less as the material becomes more advanced.