I don't think you are being an ass (arse). You are right. This situation is sadly too far out of control for a simple one solution approach and anything they start today would take years to have an impact. I have always said ammunition needs to be closely governed. If you do not have a permit to buy it, then you can't get it and rounds should be limited. Right now any 18 year old can go buy up a buttload at any sporting shop. The only ammunition currently closely monitored is .50cal. Every purchase is logged and you better have a damn good reason to be buying it. Additionally making it extremely difficult to purchase a gun would also assist.
At this point there are so many available guns for sale by private parties that are not governed its staggering. I could easily pick up a 9MM with a few calls ( No paperwork), an AR15 if I really wanted to ask for a favor. I know guys that have 20 guns or more, most are collectors and go to the range. I want to go on and say that not all gun owners are crazy whackos. But what is scary now is that kids 12 to 18 years old are now shooting up places.
Anyway while we are all up in arms about this terrible situation, the sad reality is that it will not change. The near term hype, the BS about gun control that will now resurface and Biden will be asked to fix it like every President before him. The Why and how comes will soon be forgotten until the next unfortunate shooting.