Sanji will go from getting his leg broken by Vergo, clowned by Doflamingo, clowned slightly less by King thanks to Raidsuit to defeating a Yonko's heavy hitter, but Zoro overcoming a supposed weakness of mobility will have a lot of asspulls. These aren't reasons; these are excuses.
And if King flies away from Zoro, King is a bigger joke than Smoothie and we deserve Jo_Ndule's ridicule for calling him Kaido's Katakuri.