Saw people complaining about arts like TMA, Seagull... so I am just trying to make a point First of all, martial arts are arts used to hurt other by a physical mean. So, how to harm other? By applying force, transmitting energy to their bodies, disabling their bodies' function. This is the goal of unarmed martial art. So the art often teaches the method to applying force or transmitting energy to opponent, e.g.. by punching, kicking, break joints, bite, headbutt, eye gouging,... The art teaches where to hit, how to hit, when to hit and other things like how to setup a favor situations... but in order to actually harm other, the fighter must apply the method with enough physical attributes, e.g. fast enough, strong enough, to transmit enough energy or force to the opponent's body. The basic of martial art is simple, just put enough physical force with a right method and you can harm. A soccer player, if his kick is strong enough, he can kick the sh!t out of a pro fighter, by just one kick, because it can transmit enough force to the opponent. Is that a legit way to harm other? Anything can transmit enough energy is a legit way to harm other, you can not say, but, but that is just a soccer kick, not a martial kick, when he kick your ass. If a elephant is 5 tonnes, it can sit on the lion and flush the sh!t out of it, is that a legit way to fight? Yes it is. What am I trying to say? With enough force or energy, any art can be a legit art, even a soccer kick or just sitting on your opponent. A bullet just goes straight, it is very simple but deadly. If you are 6'8" 265 a strong athlete, you can kill a 5'5" pro kickboxer. With the right attitude, anything can be lethal. It is not the art, but the person applies it, strong enough, fast enough, and understand the situation, a tae kwon do kick, or just a ballet dancing move, a boxer punch, or a strong farmer with a wild punch, under the right time, with enough force, and hit the right spot, are all legit way to harm other.