-Zoro doesn't have CoC.
-Zoro won't fight CoC users.
-Conquerors are way stronger than non conquerors.
-Underlings can't be stronger than Captains because being a Captain is a power level.
-Only the strongest can use advanced haki and Zoro will never have it.
-H-Heh you know what AdCoC isn't all that, as a matter of fact Lanji will have CoC, wings and all...
-Unstable people.
It must be nice living in a hut made of dung in the middle of nowhere.