Epistemic viciousness in the martial arts

Karateka, and practitioners of the Japanese gendai budo (modern martial ways) in general, like to extol the virtues of character that training in a martial art promotes. Yet whatever the moral virtues of the well-trained budoka, the culture of training in many martial arts actually promotes epistemic vice, including both closed-mindedness and gullibility, but also unwarranted epistemic deference to seniors and historical sources, lack of curiosity about important related disciplines, and lack of intellectual independence. This makes them unreliable when it comes to forming beliefs.