So is owning 19 firearms for "self defense." At that point, it's a hobby... and I see no reason why that needs to be protected under the constitution.
Do we? A national level gun buy back program? Haven't heard about that. Could you provide evidence? Even if true, we could do more, and on a wider scale like Australia.
It's not a question of whether I think it'd work. Do I want to give police the right to stop anyone they see and frisk them without probable cause? No I don't. I'd consider that a violation of our rights.
However, it's not really what I think on this issue that matters. I'm not an expert. People have done studies on this, and it seems like there isn't a huge correlation between stop and frisk and reduced crime.
The facts about stop-and-frisk in New York City
It applies to your evidence as well. Yeah, it's true that defensive gun uses outnumber offensive gun uses; however, that in itself, is not a reason to resist gun regulations in any way, and the numbers of actual offensive gun attacks are much harder to report, as such people tend to not want to be caught. Whereas defensive gun uses usually get reported. Cause why wouldn't they be? If you defended yourself on the street from an attacker with your gun, of course you'd call the police right after. You haven't done anything wrong. On top of that, the numbers are also not very dependable, because the gun lobby bribes politicians to make it difficult to study gun statistics.
Those proposals were just off the top of my head. There are certainly more and better regulations that experts know about. The point is that if we actually wanted to minimize gun violence, we could. It's just that we don't because... let's be honest... Americans like their guns due to cultural reasons. Anyone who says they need 2 shotguns and 4 handguns inside their home for self defense is not being honest with you, and not being honest with themselves. There in the home because their owners like them... the guns represent something to them... and that's the real reason why they hate gun regulations. The guns aren't just tools for defense, to many Americans, they're proxies for their own individual freedoms... or something.