> The "good guy with a gun" theory is that having everyone armed will prevent violence because the murderers will fear lethal punishment. Evidence shows this to be false.

the numbers also back this up: https://www.nytimes.com/interactive/2022/06/22/us/shootings-...

also, historically in the (wild) western us in the 1800s, lots of people had guns, didn't stop the violence, in fact it was just a way of life until things got cleaned up with actual policing etc