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 b

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. Many murderers either are not thinking that far ahead or are suicidal. So the net result is that more of the populace can exercise lethal violence if their inner moral governor fails -- they're drunk or irrational or having a bad day or whatever. So we have a lot more gun violence. Sometimes, rarely, a good guy with a gun cuts the violence short, so we have one more body, but societies with fewer guns have less gun violence. That is empirically true. It is the absence of opportunity, not the fear or punishment, that reduces gun deaths. What I don't understand is why anyone would think this would be different, or why anyone would continue promoting this theory when evidence, logic, and common sense show it to be false. There, I've laid all my cards on the table. I'm completely candid. Now explain to my why I'm wrong. Show how I'm willfully ignorant.