[Publius6961]

I'm just not sure that the potential good from an armed citizenry in such a situation outweighs the day-to-day problems caused by masses of idiots who own guns.)"

I stopped reading right there. Idiots with keyboards.
Those "day to day problems" are caused by criminals who manage to get any firearm they want, anywhere in the world, in addition to knives, axes, bludgeons and, anywhere in the world, explosives.

In a nation of laws, the ability to own a firearm is backup for the protection of the entire Bill of Rights.

[Callirhoe]

Then perhaps you could go back and read again, as that was the question the author was answering, not the view of the author.