All the conditions you give above, are circumstances under which people are considered to have waived their rights as ordinary citizens
Irrelevant. The point was in response to the GP's ridiculous assertion about the "current understanding" of gun rights in the United States. It is not and never has been an "understanding" in the United States that everybody should or can have firearms.
I had to get permission from our County Court Judge before I could legally touch a handgun, never mind own or carry one. He could have said no for almost any reason that he wanted. The law says I can't have a license unless I have "proper cause" but does not define what proper cause is.
It is literally a felony to pick up a handgun in New York State without a license. If you so much as touch a pistol without a license you go directly to jail without passing go or collecting $200. That's been the "current understanding" in New York State since 1911, so you'll forgive me if I can't take people like the GP seriously.
And I could be wrong, but item 8, as I understand it, is a State issue, not Federal.