It's hard for some Zoro fan to admit that Sanji is in same league powerwise, even when Oda shows it every time. Maybe they are insecure, maybe they are too much into the theory that Zoro is much stronger that they can't retreat one inch. They are stucked, reading something with a false belief. Some knows but can't take a step back, some really don't know and think are in the right. It's so sad when you can't face reality.