We once had played this game with friends where you get a word stuck on your forehead and you have to guess what are you.
One guy got C4 (as in explosive) to guess and he failed. I remember that we had to agree with each other whether C4 is or is not a weapon. Main idea was that explosives are comparatively rarely used in actual killing opposed to other things like mining and such. Parallel idea was that is Knife a weapon?
But ultimately we agreed that C4 is not a weapon. It was invented not primarily to to kill or injure. Opposed to guns, that are only for killing or injuring.
Take guns away, people will kill with literally anything else. But give an easy access to guns, people will kill with them. Gun is not a tool, it is a weapon by design.
The idea is not to sell you what you need. It is developed to sell you stuff you actually don’t need. It is by design.