No, you're ignorant to believe that even a significant portion of the American populace could stand a chance against the government. Back when everybody had muskets (when these laws were made) then sure the people could have overthrown the government. This is no longer true. What do you think would happen when ar-15s go up against unmanned drones, armored tanks, gunships, ballistic missiles and long-range artillery?
There's also the flip side of that where police end up shooting innocent & even unarmed civilians because they are afraid of them being armed.
Kinda like how bullets aren't very effective against drones that fly so high they aren't even visible (and can accurately fire missiles against human targets from that height).
More restrictive gun laws seem to be working for the rest of the western world.
Edit: Not saying there are no good reasons to have guns, but so "the government can't just come and take over" isn't one of them.