Ya I can't go along with that line of thinking. Someone intends to land a specific kick, lands it and gets a KO. Theirs nothing flukey about that at all. Timing and athleticism came into play. A right cross in theory is easy to defend against too when you see it coming, would you consider knock outs from a right cross flukey? There is a chance to defend litterally every technique out there. Failure to defend doesn't mean the strike wasnt legitimate, in fact it means quite the opposite.