They don’t have enough men to break down every door at once and as they begin they will reap the unintended consequences of their actions
If government ever makes this decision, killing 20% of Americans to accomplish it will be seen by the deciders as a fringe benefit - not a liability.
They won’t be breaking down every door, just enough doors to scare the weaker ones to give them up voluntarily, lest they follow those who were the examples.
I have pointed out previously that when they are going to go “full confiscation” they are going to know exactly where your weapons are located by scanning your home with radar and backscatter scanners before they ever approach. They will do this scanning at night while you’re asleep, hit your home with a “source” via drones and know every inch of your abode. You won’t have a chance... The no-knock warrant will allow them to kick the door down and basically execute you when you reach for your weapon to defend yourself.