However, when you consider that today a person in an apache helicoptor flying over 2 miles away can put a half dozen 30 millimeter shells in your chest, center of mass, at night, modern weapons civilians can own don't stand a chance against the government.
Really? Are you certain about that? Because we've put a whole lot of money, time, and technology to use against the Taliban, Al Qaeda, ISIS, etc and they all seem to be doing just fine against that Apache helicopter and its 30mm shells. And those Apaches have places they can safely land and be maintained and they aren't at risk for mass defecting soldier, mechanics, etc. (see how much of that happens if you turn the American military on its own people). And they're up against people who are poor, uneducated, and starving. If the War on Terrorism has proven anything, it's that this logic about "oh well you can't stand up to your own military in modern times because ... uh technology and air power and stuff" holds about as much water as a fishing net.
So then you have to ask, have we reached a point where the cost in blood of our citizens killing themselves is worth it.
The Bundy Ranch standoff demonstrated that at least some people are fed up enough to start taking a stand, but are not fed up enough to start taking potshots from water towers en masse. I think if you were to ask a whole bunch of people who would ever consider open rebellion given sufficiently dire circumstances (understanding that some people never would no matter what because of cowardice or because they're benefiting from the power structure while others would happily open fire the moment they thought they could get away with it because they have an irrational hatred of all government - but that the vast majority of people fall somewhere in between there), you would find that they'd much prefer to fight in the courts, at the polls, and at political protests until every other option is exhausted.
And this is where anti-gun folks get confused: they look at the situation in the US today and they can't imagine why anyone would take up arms against the government, let alone be successful in doing so. What they're not understanding is that (almost) nobody is saying otherwise. You have to mentally fast-forward to a future situation where things have become so intolerably awful, so entrenched, so soul-crushingly bad that your average person has reached a point where they'd rather put their life on the line to try and force a major change for the better than continue even at the status quo. If things ever reach that point - where even average everyday people can no longer tolerate the situation - then open rebellion becomes a real possibility. It's at that point (and I sincerely hope I don't ever see anything close to that in my lifetime) that the Second Amendment's value becomes clear to all but the most willfully obtuse.
And it won't be a handful of private citizens with howitzers and tanks that make successful revolution possible (even likely). Rather, it'll be millions upon millions with semi-auto rifles and handguns who present constant, relentless, inescapable, unavoidable pressure from all sides. You cannot end a force like that. You cannot control a force like that. You cannot manage a force like that. All you can do is kill everyone and then you've nothing left to rule.