Okay , i don't think there are two persons in the world that argue about the weakness areas in human body , and true , no one can condition those areas , i never said anything about that , in the other hand , and from the few street fights i saw , 90 % of the attackers will not consider attacking you in the neck or other " squishi area " , they just want to hit you as hard as possible and in any way possible . plus , who told you that they don't practice grappleing techniques ???