friend, I'm trying to make a point here about velocity. Go to walmart and buy a bullet and a firearm. Did either kill you? No? Try putting the bullet in the firearm, remove the safe and pull the trigger. Do you have a new hole in your body? Yes? What speed did the bullet have when you held it in your hand and what speed did it have when it fired from the firearm?
Any object passing through you is going to damage muscle, flesh, bone, and organs alike. Damage something vital and you just killed whatever you were aiming at.