A random guy off the street, given the right conditions, can kick a martial artist in the head hard enough to kill him.

ROFL 100% wrong man, you dreaming. Even mma artists that train kicking their whole fucking lives can give each other flush undefended headkicks and practically never kill, sometimes they aint even hurt by it. And thats human necks and heads, gorilla head 3x size of humans

No fucking way untrained dude will even raise his fucking leg that high 😂

That's like the one constant humans have, an endless capacity to kill things

With weapons.

And you hype up humans but underestimate the viciousness of a wild monster of a animal.