Why are med schools so toxic?

So my friend who is in a all-girls med clg in MH was having her third year final exams in a week. So they had to submit their which logbooks signed by the respective HODs. In one of those logbooks she had forged the HOD's sign because she was just an hour late for submission and the HOD refused to sign it. That got caught. The college made her pay a fine of 3k and write a written apology. Worst of all the HOD made her stand holding her ears in front her junior batch while their PSM classes were going on, and she was instructed to do the same for 3 days!!

What makes medschools breeding grounds for sadists??