What a strange and weak word to build an essay around. Especially since counterexamples are so easy to find.
I've certainly found that when I'm in a position of power people are kinder than when I'm not. And I've met a lot of "mean" people that I can disarm in a few seconds once I determine where that energy is coming from. (Are they scared? Overwhelmed? Defensive due to another, more buried issue?) Works online and off, in tech and the arts. Sometimes even while driving.
This essay offers no insights into the human condition -- and the detour into aggression/fighting is particularly weak and unsupported.
People have lots of reasons for being mean (or an asshole) in certain situations. And I'm certain pg, like all of us, has exhibited those behaviors at times.