I know some of Han Cha Kyo's progeny and they discussed with him why there did not seem to be contact sparring in the Military. Of course this was before TKD actually existed. Hs response was to the effect that any any moment they might have to go out and fight for real and couldn't risk being injured ahead of that readiness. Then of course there is the story of Nam Tae Hi.
""In the dark, Nam heard a noise, ran into somebody, and tried to grab the man's hair during the scuffle. The Chinese soldier was trying to do the same. With no light, the only way to distinguish friend from foe was by grabbing at a head, because communists had crew cuts and South Koreans had slightly longer hair. In that trench, Nam felt short hair — almost bald — and he struck. His enemy fell."He heard another soldier. He punched, flailed. Ran on. As the two armies fought in the dark trenches, Nam tapped men's heads when he could. Crew cut meant attack; long hair, pull back. He could not use a bayonet and fought with his hands all night, thinking of nothing — no mind — stumbling through the dark, striking , kneeing, moving. When he fell, he would stand again. The next day, the communists retreated from the trenches and the fighting continued with guns... The next day's battle ended as night fell, but Nam kept fighting. Most of his thirty-one men were dead, and he had not slept for three nights. He had not eaten in how many days? He worked out that he had missed nine meals. He collapsed from exhaustion..."That day, during the retreat, Nam wandered to a spot where he had fought during the night before. He found many dead bodies and counted more than two dozen with no bullet or knife wounds. They were the ones he had hit during the night, the ones with broken faces and bones,"