What Martial Arts that when comes to the ring or cage that aint sport? The fact is when a martial art master enter to Ring or Cage is limit to a set of rule of that sport that means all lethal moves of a style already not allowed to use. Take Muay Thai for example, you dont see they use elbow, knee, knuckle, on the ring and other style of Jiu Jit Su, Vovinam, Karate, Ninjitsu....etc. of neck break, eye poking, internal organ damage, neck chop...etc. all martial arts are built on the concept to destroy or neutralize the enemy that have been use for thousand of years to do just one thing as that. So saying because of TKD are suck because it is sport and all lethal move have been removed, well so do other style when come to ring. It is more like an excuse many TKD fans often use defend their beloved style.
Watch this video and let me anylyze why the Shaolin monk win. For someone who practice martial art does not hard to see TKD weakness in this clip.
First the TKD guy use mostly high kicks, aim at opponent head hopes to hit the head, this TKD guy are better than others which he utilize his hands and punches. But high TKd kicks are not effective, When do high kicking TKD tend to jump high to aim at opponent head or spin kick at middle lower part of body, indeed jump kicking generate more power, but it expose many weakness, easy for opponent to exploit and not good in long fight, that means if you can't KO opponent with your kicks you are done. Consider how much enegry you use in each kick, and you create yourself unbalance stance and your whole body expose. Toward the end the guy can't kick no more because no more engry for any kick.
The Shaolin Monk, watch closely he does not use Kung fu to beat up the TKD guy, he use Muay Thai techniques instead. He must have learn from his other match where he lost for muay thai powerful lower kick. The monk simply uses lower kicks at TKD leg or sweep the leg, catch the leg and throw punches, or simply close the gap with tKD guy to neutralize all TKD fantasy kicks,all that simple moves which are effective against TKD. Done, easy to destroy a TKD predictable moves.
Dont know how often you martial arts practitioners here do sparring, to me it always best to let the opponent not knowing your next moves or trick the opponent into believe you going to kick but you throw punch at him instead.