I think it's because being an intern is not as bad for a person's ego. Like if you have a manager and a report they are basically the same, except one is above

I think it's because being an intern is not as bad for a person's ego. Like if you have a manager and a report they are basically the same, except one is above and one is below. "Why me below?" Well in the intern case that question has a very obvious answer. Plus you know it's for a limited time.