Note however that America is not only not unique in having that background proficiency -- but unlike mandatory military service, this approach has not really been tested. It's far from a certain proposition either way.
I don't think that unclear merit outweighs the very clear and data-driven drawbacks. I just prefer to engage subjects like this in a charitable manner.
i doubt we will see this in my lifetime
I'd turn that around and ask, "What makes you think the people would accept the gun nuts rebellion?"
Many would be celebrating in the streets if the military showed up with tanks and started blasting. Furthermore, there's enough people in the military from far, far outside whatever state is being threatened to care that much about the locals.
"Fuckin' Texas gun nuts" <starts shooting>
Guns are not only for counter-insurgency on invasion/warfare. For most people I know who own guns, that's not even on their top 10 list of reasons. But if you don't think they'd be a factor, then you disagree with some of the top generals around the world.
They're for putting a bullet in you and/your your family if you act as a collaborator, taking potshots at the logistics train, and all the other nasty stuff you have to do to make occupation costly in terms of both life and dollars. Every cent spent on putting bullet proof glass in the camera installation van and drone cages on the police station and using those cameras and drones to track down the guy who shot you for collaborating is a cent that must be extracted from either the occupied population or the population that's financing the occupiers and not spent in direct pursuit of the political goal.