he could did that too but there is a story between Sanji and Queen.
Queen's relation with Judge
Both have scientific battle
Both are into Momo's sister.
Zoro even didn't know he has king's haki till recently he needs to train himself little bit in that and Kaido is not really the suitable person for that. i dont say that Zoro will not fight Kaido again later just for the Moment he would fight King since King is more or less is the only swordman in the crew.
Queen's relation with Judge
Both have scientific battle
Both are into Momo's sister.
Zoro even didn't know he has king's haki till recently he needs to train himself little bit in that and Kaido is not really the suitable person for that. i dont say that Zoro will not fight Kaido again later just for the Moment he would fight King since King is more or less is the only swordman in the crew.
Zoro vs King made sense pre rooftop because it was supposed to make him grow to
Learn how to Cut fire
Improve his coa to cut kaido
Get stronger
But zoro went straight to kaido
Could already cut fire
Could already cut kaido
Got pushed to the point of unlocking acoc
So where does that leave a fight between King
Where's the room to grow
King's fire is irrelevant
King's haki won't be superior to zoros at this point
Where would be the growth