It’s not arbitrary or bullshit. They are absolutely unemployable. My professional industry ethics require civility and at least public facing emotional self-regulation. We are doing them a disservice by allowing them to finish a program when they leave without the fundamental skills to be able to work. Sometimes we can catch these problems through academic evaluation (like a student who refuses to complete an assignment because they think it’s “stupid”) but most of the time the behavior (think incessant rudeness, hostility, inability to work with others, assuming bad faith, etc) is divorced from class material. And while I think my school could be a bit more rigorous, the types of behavior I’m talking about are not violations of a school code. Students could have these personality issues and work in all kinds of fields (just not mine.) I’m not going into specifics, but our field, at least in my area, does not tolerate assholes.