Kaido took countless of blows from G2/G3 stacking and G4, all amped with advanced Haki, after already a running a gauntlet and while carrying an island through the air. And even after that, he was taking on G5 and dominating.
Kizaru survived only for as long as Luffy didn't use adv. Haki. Convenient, isn't it.
Could Kaido speak after the scabbards sliced his ass unconscious?