....Why is it OK to hit them once? What about if you don't hit hard enough and need to give another whack to equate to what a harder first blow would do?
Reasonable force crappy argument makes me cringe.
Fair enough, martial arts specialists can probably deliver measured force to whatever they do, on the other hand average citizens don't even know what their physical force can do, so how to make it reasonable especially that they also don't know strength of their opponent!