Non-american here but I truly believe it's too late for them.

They have too many guns, too much of a gun culture and a bunch of other problems that mean they'll genuinely have a much harder time enforcing any ban

South African here, we have pretty strict gun laws yet if you have corrupt police, like ours where there is a commission of our police service happening right now and cases of police selling firearms to criminals, the gun laws are targeting civilians wanting to protect themselves legally and not criminals. Since our last amendment of the law that places stricter controls did not lead to a decrease in criminal armed violence. Easy to say restrict guns if you have never felt a barrel being pressed against the back of your head.

Couple of years ago we had an almost church shooting in SA, armed criminals were almost immediately stopped by a legally armed churchgoer, think it happened in Centurion.

I think it should be a push and pull, just legislating it does not automatically make society safer for everyone, you have to look at the need, imagine Sudan's recent massacre, what if those ordinary citizens had access to firearms a bit more freely, would that have been a bad thing? What about Myanmar with its resistance making 3d printed guns? Should that be outlawed, how would that nation enforce it. I won't lie if I am in a country like the Netherlands, never been there but in my mind I think they are one of the safest people in the world for this example, I cannot see a reason why you would require a firearm, well currently, in that situation in a reasonable capacity.

If your country is peaceful with no crime and all society's problems are solved then yes why would you need a gun, but until then, where there are reasonable reasons to have a firearm I am of support of firearm ownership. I honestly never wish to be put in a situation where I have to use it, it will then be a successful ownership.