You're right. I'm 5'7" and low 200s and people never bother me. I'm not aggressive , but aware of what's going on around me. I don't consider myself a fighter in any way. I get your point. If the show is legit I guess delusional fools are what they are. And if it's fake, well, that's acting.
My only self defense training was with firearms but that did help my awareness and seemed to help with my assessment of who is tough and potentially dangerous. But part of that is knowing that it's easy yo conceal a weapon so your way of looking at things is changed from the average persons I guess.