Still, they're not slaughtering each other with guns. Why?
You're asking the wrong question, if you're REALLY interested in tackling the issue of gun violence then what you should be asking is why do some Americans shoot other Americans and gun ownership isn't the answer (10 of millions of Americans own guns and only a tiny fraction ever harm anybody with 'em (accidentally or on purpose)). There's been discussion about mental health treatment related to this issue and that's a step toward the root causes but we need go further, for example much of the gun violence in the U.S. revolves around the distribution & sale of illicit, right? what sorts of things could be done to mitigate that situation? If we actually care about this issue then we need to at least be honest enough to acknowledge that the answers are not easy one-liners like "gun control" because that's just a lazy way out and is nonsense, people intent on giving other people lead injections are never going to bat an eye at obtaining guns on the black market, so our objective must be to reduce the number of people intent on shooting other people.
I'm all for solutions that will actually reduce gun violence which means that I do not accept that pat politician, easy to sound byte answer of "gun control" which will not only be ineffective but will invariably punish the law abiding people that want to pursue their right to own a firearm.
On the other hand if what you're interested in doing is regurgitating talking points that will not accomplish anything positive then "gun control" is as good a pointless platitude as any I suppose.