Maybe a better comparison is gun control in other countries.
"Sure its a bumper sticker slogan but there is some truth to the slogan that "If you outlaw guns, only the outlaws will have guns.""
So what, "some truth to it" is a shockingly low standard.
"To me the only truly effective way to neutralize criminals or insane irrational people with guns, is to surround them with sane and rational people that peacefully also have guns."
To me this is nonsense because:
(1) Countries with gun control have neutralized gun violence without arming the entire populace.
(2) Allowing the entire US population to arm freely has had a net negative effect on controlling insane people with guns.