It's a good point, Rob. But when you start limiting the ability of citizens to own the tools of self-defense, you're likely eventually to arrive at the position of Venezuela or North Korea where the only guns are in the hands of dictators and their flunkies.
Yes. Canada, Australia, UK, NZ, most of Europe, Japan...so few good examples compared to your extreme ones, right?
There's nothing "likely" about your scenario unless you add in dictatorships, or unless you have governments who blatantly and openly lie and attempt to control and suppress the media and who have blind followers who accept their every word...
Rob's point was exactly on point. There's a reason miltiary and police forces use guns and not other forms of weapons. Guns amplying and multiply the killing capacity of an individual more than any other personal weapon. Easy access to guns means far more people are able to inflict far more damage and death then if they didn't have access.
The US can and should determine what it thinks is right for itself, but when I see some folks literally saying that the 2nd Amendment is "God given" and cannot be removed, I think there's a strong case to suggest some people shouldn't have so much of a say in things.
So, yes, people do things, but when you give them tools that make them better at it then there are consequences and your founding fathers could not possibly have conceived the impact of personal arms in the modern US. But, hey, just turn your schools into maximum security prisons, with more protection than a military base - that'll be an outstanding learning environment for kids and will help to "fix" the education problem you think exists.