Come on!
If a kung fu person can get into a position where they could maim another competitor, then surely they could show enough restraint to follow a ruleset! What difference is it between the skills needed to land a strike to the chin, or a poke to the eyes? It's amazing that in this day and age we still have people who think that a kung fu practitioner can't compete because thier stuff is "too dangerous".
If you're trying to suggest that punching, kicking, and submissions are low level and that there's much easier ways to defeat another person, then you must be a representative for the NRA.
A gun would be the easy path.
Otherwise, it takes skill to step into a ring and fight another trained competitor. More so, it provides an opportunity to hone skills that surely will come into play should a person ever truly need to fight for thier life. Also, it demands a level of fitness that surpasses the "CMA for health" crowd's standards.
I'm not trying to advocate MMA, the UFC, or professional level fighting, but some competitive experience or at the very least some hard contact sparring with other martial artists of varying backgorunds is a logical, if not essential part of anyone's training.