How come people don't know how to fight?

Coming from a long line of Bad Asses With anger issues; The first thing I learned to do was fight properly. I was taught to defend myself. Jab, Straight, hook, I learned it all especially grappling. But I see theese people on TV (like "cheaters") and other shows as well as real life; I see them Swinging and almost falling over and off balance from their own punch. It makes me laugh when they start swinging at eachother and after 6 misses they finally connect having put "All" their energy into a punch which I was taught was idiotic. So yeah can anyone tell me why?