you people have to take in account several things.

You cant carry a bat or shotgun around with you.

Most instances where the good guy wins all that happens is he shows the attacker his gun the attacker runs away and not a single shot is fired.

you also need to remember that the only way people can defend themselves is with a gun. for instance a very old man a handicapped person or even someone who is just naturally weak. These are the types of people that criminals look for.

Lastly bad guys are bad guys they will find a way to get a gun no mater what.

when faced against a stronger person the equalizer is a gun.