What are we even measuring when something is good/bad for students? Obviously anything akin to directly abusing students would be bad for students, but I imagine we're talking about the quality of the education they get based on the quality of their professor's teaching ability.
If we are just talking about learning qualities, isn't the selection of students in higher level academic programs already heavily curated and biased towards students who have proven they are good at learning? Shouldn't this cohort of proven learners be resistant to any fluctuations in the teaching quality of professors?
Forgive me if my question shows a higher level misunderstanding, but I stumbled into my career in tech without any post-secondary education - so I don't have firsthand experience with any real academic settings.