Surely you can understand learners of martial arts would actually don't want to get broken noses, knocked out teeth, bruised ribs, dislocated shoulders etc? If people want to fight full contact without pads that's their decision. I've watched full contact fights with guys being punched in the body and just laughing. In the style of karate I learnt most blows were aimed at the face/throat/ groin. they are the kind of moves that when carried out with great force and perfect placement would not be at all pleasant to experience