Many, especially younger, people get a sense of self from things such as guns, cars, and boats, but that’s not the point.
A “well-regulated militia” doesn’t mean everyone can simply buy an assault rifle at the nearby grocery store. You can’t do this in Switzerland or Israel where I believe everyone that is supposed to, have a gun, but, afaik, there are no mass shootings like in the US.
Something is wrong with a society where you can’t drive a car without a permit or even a medical exam if you are of a certain age, but you can own a gun without any restrictions.