I get it. Your perspective is completely normal. But you're talking out of fear. While it's fine to take note of it and make plans in case of worse outcomes, allowing fear to take charge of your decisions will only cause you to fall deeper into it.
Most people don't know what you think they know. Take any family and you'll almost always find gaps in their shared facts. Our presence here on Lemmy is deceiving us in what is supposed to be common sense that is often not. But at the same time, the fediverse is a good example of how many topics and interests we don't share or know of at all.
And besides, if these gun wielding maniacs are so widespread, why would running away help? You'll just meet them everywhere you go. Makes no sense to trade the danger you know with others you don't. Call it survival, but it's really waltzing away with limited resources and knowledge into the great unknown.
Less fear, more reason. Or you'll just drive yourself crazy with worry.
You should have faith in humanity. But faith is illusory and reserved only for things that are highly unlikely to happen. So your faith was well placed, it just didn't pan out. Which is pretty standard overall.