There are actually a few Kung Fu fighters in the UFC, and Kung Fu styles have been used to train MMA fighters, but the primary reason there aren’t more is because the UFC is a mixed martial arts organization, and Kung Fu is primarily focused on one specific style of martial arts. By its nature, Kung Fu is not designed to be effective against mixed martial arts. For example, practitioners of Kung Fu often emphasize technique and leverage, whereas mixed martial arts emphasizes a more aggressive and unpredictable approach, which is more effective in actual combat.