You are misrepresenting what the original poster said. He did not say that he actually called kids "dum-dums" or that the kids were, themselves, a waste of life. He said that using AI to blast through assignments without learning anything from them was a waste of life.

Frankly I applaud that approach. Classes are to convey knowledge, even if the student only gives a shit about the diploma at the end of the road. At least someone cares enough to tell these students the truth about where that approach is going to take them in life.