The guns haven't been taken away only because people do care so much about the 2nd amendment. Those people understand that the 2nd amendment is the only ultimate defense for the people against the government.
I too wish people also cared as much about the 1st amendment, but sadly I think the tide is turning on that. Too many on both the right and left seem okay with censorship and harassment.
With the government harassing, attacking, and now killing innocent American citizens, I'm not so sure if the second amendment is working out so well.
With the ridiculous leeway American law enforcement has when it comes to harming people ("qualified immunity"), I don't think that second amendment will be relevant until there's an outright civil war happening. And when it comes to that, one or both sides have access to predator drones and fighter jets.
Kind of ironic that there's a big overlap in the venn diagram between 2nd amendment enthusiasts and the crowd that is cheering on the government's authoritarian actions.