No that is a fallacy. The gun owner has no more control over there shot than an elf with an arrow, or a wizard with a lighting bolt. 

Your samurai argument is invalid. The samurai does not control magical forces, does not move at faster than human speeds, fly or any other event that characters in arena role-plays can do. If you are fighting a realistic fight then it comes down to cover and fire to win. If you are fighting against a character that is beyond human then the gun and it's properties are just as valid an attack as a spirit attack or having an immortal who has mastered untold forms of combat. 

Ultimately you never have to fight anyone with a gun. It is an age old argument since the beginning of chat room combat. There are plenty of fantasy fighters to satisfy you, just as there are tech fighters to fill my whims when I need them.