Thanks Malgus, you are right, I agree with physics, can not go against that. It would be like I am saying that it is better to have spear then loaded rifle.

Simply I am trying to say that whole set of other factors need to be considered before saying that “I ll be safe with 9 mm, AK 47, Glock (or whatever else ) because it is best.
Sometimes people who are not experienced real gunfight, or do not have any experience with any shootings have tendency to misunderstand what is all about.