Please link the chapter where Zoro made Enma black? I am not interested in your fanfic of when or if he will make it black
Once you get to a certain level people are too scared to fight you.
See:
-Shanks vs Mihawk- twice Mihawk declined to fight
-Shanks vs MF - all the admirals declined to fight
Only ones with the courage where his fellow Yonko WB (In WSM condition) and Kaido.
Everyone else knows their place