I think most people do not pay for teachers' quality. People pay for the diploma's brand. (Which is a proxy of the probability of landing a good job after graduation.) For that use case, as long as the chatbot teachers don't degrade the university's brand name, I think most people won't care. They might even actually prefer it. (I graduated from the top engineering university in my country and I'd certainly prefer ChatGPT over the vast majority of the TAs I had).