Professors in these specific fields don't make a lot of money. The majors they are teaching basically prepare you to turn around and come back to teach it, so the supply is too high for them to get paid good like the Researchers or STEM profs do. Unless they teach for a higher end university of course.

But of course, the fact that they teach a course that's entire purpose is to spend money on a "we are teaching you so you can teach someone else to teach someone else" cycle is lost on them. As its only something that could exist in capitalism.