I really understand how you see it. You made very remarkable points.
The first time humans came up with weapons were for hunting animals, not for killing each other or raiding and pillaging but for hunting. So it would be impossible to see a world without weapons.

Even if we found another alternative to hunting with weapons we would still invent weapons because some lustfull jealous guy is going to attack someones family and they need to protect themselves. So it is entirely impossible not to have weapons. I mean we turned our body, rocks, tree branches, plants and even water into a weapon, (drowning someone or something for those who are wondering).