Thats a great point. TKD is best suited, in my opinion ,off the cuff ,straight away, pretty close up and doing simple things very hard repeatably before the other guy gets going. If its been taught well. The big but is that a person can not afford to predict anything so if that has not worked you are now in a fight. And not all things start like that. And your fist attempt to defend yourself might go wrong. Also the big flaw is you do not know how good someone else is untill it is too late. Every one seriouse about SD should be treating the person they have to defend against as highly skilled, in my opinion. You just dont know. Its a myth that everyone is untrained. Why take the risk. Its not all ''thugs''. Anyone can attack and be attacked,anywhere..everyone has a bad day..there are millions of scenariose that could have all different types of personalities attacking someone or trying to fight someone. There is no steriotype ''bad guy'' . Then there is simply the experience of trying to be as good as possible.