"Oklahoma Wesleyan is not a “safe place”, but rather, a place to learn" Exactly, I don't get why people are trying to make universities, workplaces, clubs, or anywhere else "safe places". They should not be safe places, they should be places where you feel confronted, challenged and threatened by different ideas and points of view.
Obviously there are all kinds of things we do to ensure that universities are safe in different ways, and we find ways to try and ensure this safety doesn't interfere too much with learning. Why shouldn't this concern for safety extend to the mental health of students? Chanting "universities are not safe spaces" is a way of avoiding thinking about what kinds of safety we already provide or could provide, and how we can combine these kinds of safety with the challenging education that everyone recognizes is an important part of higher education.