The last time i looked m/t does not teach defenses against back attacks, karate doesn't cover ground fighting, boxing does not show control holds against non violent attacks, all systems cover some parts of self-defense, but they all fall short in the long run. self-defense is its own (art) style. karate sparring teaches control of distance, timing, how to close the distance, and that is when fighting starts, whether hitting, kicking, choking, using knees, continuously driving through your opponent until they are no longer a threat. to be effective you must first have a clear vision of your goal, whether street fighting, competition fighting, controlling an opponent, as in law enforcement, or survival/self-defense.