"Yes, that is the point of a gun, to defend and kill if you absolutely have to. You may not like it, but the gun in the hands of a responsible gun owner is the best weapon the average citizen could ever hope to attain, hence why it’s known as the great equalizer."
A responsible gun owner... there you got THE Achilles heel of the entire point why people want to keep guns, and also the reason why many countries no longer allow them. Who is a responsible gun owner? At too many times it was evident that when people irresponsibly use a gun killing or otherwise life threatening people in the process, deliberately or by accident, it turned out to be people nobody could ever imagine to do such a thing. And this is also the reason why people who want a permit for a firearm are thoroughly subjected to heavy screenings too, and even a professional psychiatrist is often required for that and even then a gun can sometimes legally find its way to unqualified hands (nothing is waterproof after all), but it at least reduced the chances this would happen. You can't get a permit without giving up a good reason for it, either.
Many people my think they can handle a gun responsibly, but only a few have such an ability, not to mention that if you are a responsible gun owner today, doesn't mean you'll still be tomorrow. When a lot of bad luck strikes you due to things outside your control you can easily destabilize and then a gun can easily become a threat to yourself and to others... Boom... Perhaps this shines a light on the many shootings in the U.S. Shootings are often performed by people life was never kind to. Do you know why they want to kill like crazy? Because they were so powerless in life that this way they can once more shine before leaving this in their view cursed world, and when you kill like crazy, you have the power and everybody fears you. Also the reason why they don't fear "good guys with a gun". They were ready to die anyway. If you won't shoot them, they will do it themselves. The number of kills is not important, the power they had is.... With the "right" to have a gun, the easiness to obtain it, and nobody who can see what goes on inside your brain.
So the question is... who is a responsible gun owner? Can you tell? Since even professional psychiatrists have been proven wrong in trusting people with a gun, don't think you can easily tell this...
I think I'd prefer a bulletproof vest... Thank you :P