Zoro will use this later on in his fight with Kaido to counter his whirlwind attack and eventually, Zoro will learn to use six hands and three faces in the form of Demon Aura Asura.
Like What may help solve the apparent inconsistencies is to note the growth of Zoro since the start of Wano.
Zoro takes a decision and informs the law that he is going to attack Kaidou with all his efforts.
Thats Explain why Big Mom and Kaido are Both so Broken, nothing even advance busousoku can hurt them significantly.