Battle was basically over.
Kaido was helpless on ground, Oden about to launch the second attack that could finish Kaido off (or third, fourth etc until Kaido died) but then distraction came.
Lethal DFless swordsmen don't have to tank much because the battle can be basically over after 1 attack. But if the DFless swordsman can actually took a beating, then it is even better.