Oda said it through Kaido.
Is it that hard to see Yamato clapping Akainu's ass cheeks?
Remember, it doesn't depend on me and you. It depends on Oda.
He is the one who stuffed Yamato with great abilities: special race, special devil fruit, special haki...
What are Color trio compared to that? Cabin boys of the Elders...
While I could argue that Zoro is stronger, maybe he cant break through her aCoC barriers.
Doesnt really matter anymore as Zoro has the same ability and took it to an even higher level than mere aCoC users...