Earlier quoted context omitted.
Sorry. Guns do kill people. That's their whole point. I know roughly ~1000 people. Maybe 10 of them have the physical capability of killing someone, in case you don't know, it's not actually that easy to do it yourself. Of those not all could mentally do it under anything but the most extreme of circumstances. 2, maybe 3 might be actually capable of ending a life under extreme circumstances. With a gun probably, at a…
You dramatically underestimate the physical capability of the people you know. Humans are strong and humans are fragile. Every single one of them could kill another human in a pre-technological society.
On your point I'm not sure where you get the assertion any human could kill any other in pre-technological society. That appears evidently false to me. How did you come to that assertion?