I am not too sure about that mate, almost half of the K1 titles have been won by Karate fighters like seidokaikan and kyokushin styles.
Actually come to think of it apart from karate and muay thai, I cant think of any other style that has won it!!
Seidokaikan and kyokushin differs a lot from shotokan and pretty much the rest of karate. Kyo is full contact, no hand gloves but no punches to the head. These karate fighters took boxing for k1 to improve their hands. Machida does shotokan karate which is mma gloves, half contact and punches to the head. Completely different styles. Machida does not punch often enough for a k1 match. With bigger gloves there are smaller holes for a punch to sneak in. And its harder to ko someone with boxing gloves.
Nichts reimt sich auf Uschi!
Nothing rhymes on Uschi!
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