How naive you have to be to believe Oda is going to completely discard devil fruits, that are the DNA of this series for generic DBZ aura shit? Peak recency bias.
suicidal drunktard ain't really the sharpest tool in the shed either, considering that literally one chapter after that haki trumps all speech he pulled his most powerful move, that consists of a gigantic kilometers tall and wide flame dragon only possible due to his mythical zoan.
It gets even funnier once you realize Kaido said that because of Roger, yet we readers saw how Loger became pirate king. Ducked Big Job and begged on his knees for Whitebeard to give him Oden instead of using his giga haki to pressure Meme into giving the road poneglyph and WB to hand him Oden