Because this is how matchups are decided
There WAS evidence of Zoro fighting a Yonko. There WAS the potential for it as a cool moment that could only be "guessed" as a possible means to deal with Kaido circumstantially (Oda would never let Zoro overshadow his MC, so killing him outside of a very strict cirumstance made no sense because Zoro isnt the Yonko, his captain is).
You guys were looking at color spreads of Zoro eating Ramen, misunderstanding "when" Enma needed to turn black (i.e. not Wano) based on how you interpreted english from Sukiyaki/Tenguyama, and using "Monsters" as a strict canon parallel to compare Zoro and Ryuuma to them cutting a dragons head off (when zoro already did it lmao) to justify this instead of just saying "hey, it 'might' be a cool thing that happens but I doubt it".
Even now you are trying to frame it like Oda had all the intention to do and didnt, which is just straight up maniacal lmfao.
Now you actually fucked up this logic, because Lucci quite literally is the leading example of being a follower:
Oh look, another example of Lucci being the dog he is!
But I guess that works for you now because Zoro is fighting Lucci