Yes, my house keys are definitely a weapon designed to kill in the same way a literal gun is, such a great argument, well thought out, totally convincing, it's so obvious, how have I never looked at it that way before?

Oh wait, my bad, that's absolute horseshit and you know it.

You are technically correct that you'll have no choice but to encounter guns in the gun culture you're promoting, but the problem with that argument is that that's within the gun culture you're promoting. Guns cause the issue, more guns will not solve it. In my country there's been no mass shootings (that I'm aware of) for about three decades and pretty much the only time I encounter guns without specifically choosing to is in the hands of police at large public events or any lgbt+ parades, and those feel incredibly excessive. Guns aren't an issue because there is strict gun control and no gun-centric culture.