I think that is an interesting point Mark. Arts like TKD and Karate often do emphasise a philosophy restraint and not attacking someone unless attacked first. That said, in the sports of TKD and Karate, practioners are engouraged to be aggressive in order to win matches. It most definitely can blur the lines of what the art is really about.
"Let your food be your medicine, and your medicine be your food" Hippocrates.