This isn't some trivial difficulty with choosing a narrative. It's the implied cultural supremacy in arrogantly believing that YOUR perception of what is moral is so correct that it should be taught in university.

The same reason that government shouldn't be legislating religion. I went to college to learn science, mathematics, liberal arts, so that I could learn to make decisions for myself-not to be indoctrinated with someone else's idea of what is right and wrong.

Edit: imagine a Saudi funded institution in the U.S. offering courses on ethics. Would you be ok with that? Why are you even sure that the particular ethics courses in Harvard agree with your own cultural norms? When you mix subjectivity with education, you get propaganda. Sure, some of it is unnavoiable because ultimately there are only so many topics one has time to learn and all educators/authors are biased humans, but the topic of ethics does not even allow for the possibility of objective treatment. It does not belong in school.