martial arts is all relative...yes, i agree, hwa rang do and tae kwon do, don't particularily fair well in the ring per se but you have to remember that it was never designed for the ring.
Koreans were farmers back during Feudal Japan. Japan at that time was the wealthiest empire in the world and they went on a rampage to conquer all of Asia. They eventually marched towards China, but to get there, they had to get past the Korean farmers.
So China sent "spiritual warriors" to Korea to teach them how to defend themselves. Remember that we are talking about a very limited time before Japanese troops invaded. So many techniques that would be ridiculous to contemplate using today, were completely valid back then. During that time, High Kicks, Spin Kicks, Jump Kicks etc...were all taught because Samurai's came on horseback swinging 32" razor blade katana's at them. So the most important thing was to knock that sucker off the horse. Usually, these high kicks were done leaping from trees. once the Samurai was on the ground, the rest of the Hwa Rang Warriors would jump him.
This also brings up the reason why they trained to punch and kick through wood; because of the wooden plates of armor that the Samurai's wore.
Just as many Grapplers poke fun at the Korean Arts today doing BJJ against a Samurai back then would have been pointless.
Sorry for the history lesson. I don't even study Hwa Rang Do or Tae Kwon Do, but i do believe that every martial arts has or had it's time and place.