Disagree - makes for a more polite society if one just assumes everybody else is armed. They don’t need to see what you may have.
Here in rural PA, we do assume everyone’s armed, and we’re still not always polite.
Too many men around here are carrying more liquor than they can run with. I’m not against open carry but there will be casualties. Bad-tempered old boys behind every truck.
Heck, not too far from here and not many years ago, someone winged Santa in a Christmas parade.
So far I’ve not found anywhere I’d rather dwell. :)