An armed society is a polite society
And like you said, it’s not just because the other guy might be armed
Yep - it really helps if most of the armed folks actually value life.
Addendum - when we joined a local shooting range, the briefing also entailed obeying and enforcing the rules ... the guy reminded folks, that while they should point out if someone was breaking safety rules, they should do it in a fashion that took into account that they were talking to an armed person.....