My guess would be that it's less about "position of power" and more about "less likely to face consequences". You see the same type of behavior in a variety of cases
- Construction workers hooting and whistling at women
- Gamers online being horrible to _everyone_
- Managers (as noted) sexually harassing employees
All cases were consequences for behaving badly are far less likely.
What is power, if not the ability to do what you want without facing consequences? If other people already support you or are indifferent, no power is needed to do what you want.