That was a force of expression, the damage was not insignificant
this wound from pirate hunter
- BM asking kaido about his wound :
this wound from pirate hunter .
how would he remember frauduffy who disappointed Kaido ?

Luffy being defeated or not, he was the one who got Kaido excited, and we saw several times in Kaido's countenance that he was having fun Luffy's progression and strength. In addition he recognizing several top tiers in a silhouette behind Luffy.
Luffy with top tiers behind him :
it's shallow .
while Top tiers can give kaido heavy damage

Kaido never recognized Zoro that way and said he was a nuisance, there is a gigantic chasm of portrait difference here
Kaido cried over that fodder
there is gigantic chasm of portrayal here between someone who made Kaido disappointed and cried and while someone who made Kaido calling him you did enough and he would be asked / see that when he watches himself in front of the mirror
and asked about joining force with him while he laughed at koed luffy and law was far away 


