The fee-paying customers argument does have a lot to do with this. There was a time when students entered the university expecting to be challenged, to have their minds expanded, to learn critical thinking etc.
It wasn't all wonderful as universities have always been hierarchical institutions, and they certainly needed much more work.
But the basic understanding was NOT that students enter all finished with their mind development and that so the universities should respect and honour all their initial views and not challenge them at all.
Now it seems to be the reverse of that where the expectation is that of a self-service restaurant where the students only pick some additional bits of information which won't make them feel uncomfortable at all. And feeling uncomfortable is now labeled as feeling unsafe.