Nobody said anything about guns not existing. Only about gun laws. You can’t regulate guns out of existence, you can make them with parts from a hardware store or a 3D printer. There are literally us government handbooks on how to improvise firearms. The genie is out of the bottle and we will never again be in a world without guns. The only question is if we make the idea of them taboo and illegal for civilians or not. But as history shows over and over, when citizens are disarmed bad things happen.