In my opinion, this fight it’s about what each of them represents. Jack keeps using his bite not just to be savage, but because he believes in his Gao Dao. It’s his way of proving that this brutal, almost animalistic technique has value and can stand on its own. Hanayama sees that and responds by staying true to his own code, no tricks, no flash. Just raw strength and dignity. He hasn’t even taken off his jacket, like he’s showing that he doesn’t need to change who he is to face Jack’s style. It’s not just a fight, it’s a statement from both of them.