Comment by pca006132

There are many issues here. The lack of incentives is probably the most important one. For new professors (in research universities), good teaching is usually just a good thing to have, but it is not a deciding factor for their tenure. When they get their tenure, they probably have enough students, and they need to work hard to apply for funding and keep the students paid. Administrators care most about ranking, and teaching isn't really evaluated in the ranking. They just push the professors to do more research and apply for more funding.

It is also hard to evaluate university teaching because there are no benchmarks for that (compared with high school, for example), and it is hard to judge if teaching is good from student feedback. You can only know if someone fucked up or did really well, which are outliers.

There are other issues as well. Professor IMO is a ridiculous job, you are supposed to be an expert in the field, be a researcher, be a manager, be a teacher, be a salesman, all at the same time. There are people who can excel in all these, but these are probably just outliers. It doesn't help when PhD training doesn't train you to be a proper manager and teacher. While there are some teaching training, I think we are not really held to a high enough standard. E.g. One can pass the teaching course if they just show up and spend some time, even though their teaching is horrible.