Oof, giving arguments against ZKK is fine, but at least make sure they're good arguments.
Luffy told Zoro he's got it.
Luffy has to win 1v1 against Kaido, otherwise, he doesn't even achieve the 1 thing he set out to do for this arc.
However, the first 'K' in 'ZKK' doesn't stand for "defeat", it stands for "kills".
Zoro can kill Kaido after Luffy has defeated him. An argument that has been made millions of times.
Zoro didn't cut King's dragon above the Flower Capital.
Oda draws a nice little diagram showing you that we're not above the capital.
So what if he's suffered a lot of damage?
This is a Shonen. A character can "surpass their limits".
Not to mention, there's numerous ways Oda can get Zoro healed temporarily if he chooses to do so.
Kaido said the one who defeats him is Joyboy. This is correct. Luffy has defeated him and he is Joyboy.
Similarly, Kaido said that he would let a monster Samurai of Oden's like kill him.
If we truly care about what Kaido says, we cannot ignore that.
Luffy as I said *has* to win this fight.
Zoro cannot kill Kaido if Luffy doesn't even manage to break the idea of Kaido being the 1v1 king.
Oden died from a gunshot.
I guess you mean surviving a boiling is the parallel between the two?
Maybe Oda simply doesn't want Kaido to die due to anyone.
Instead, he dies to supernatural forces, or maybe he doesn't die and he's stuck forever immobile and the idea of him being un-killable remains but he still gets taken out of the story.
It doesn't matter which side you're on, use better arguments.