Wuxia Fiction has its share of extraordinary physicians whose skill at healing the sick and wounded is as uncanny as the great wulin warriors' ability to kill and wound. So incredible was the skill and knowledge of these men of medicine that they could heal injuries and illnesses that were generally considered incurable in their world, and would probably be incurable even with modern medicine in the real world.
Yet strangely, no wuxia physician ever served as the royal doctor for an imperial regime. The Chinese emperors had in their courts experts of healing who had been recruited from throughout their domain and tested through the rigors of the civil service examination. The responsibility of these medical experts was sublime (e.g. preserving the health of the Son of Heaven and his family), so their skills must have been superlative.
Therefore, it's odd that Divine Healer Sit (DGSD), the Indian Monk (ROCH), Wu Ching Ngau (HSDS), etc., never served as royal physicians. With Dr. Wu, we can understand that he had a personal rule about not treating patients who were not Ming Cult members (and in any case, he'd never serve the Mongol-ruled Yuan regime), but Dr. Sit would have had no problems serving the Northern Sung emperor, and I imagine the Indian Monk *could* have served as Deun Chi Hing's personal physician when Deun was still the sovereign of Dali.
Yet we never hear of these great healers being recruited for the position of royal doctor. Why not?