It's got nothing to do with the fucking clouds or flames. Luffy doesn't have black or white or pink flames.
It's about the idea that "no mentioned of awakening = no awakening". Now the flame experts are inferring Kaku has it, even though it's not explicitly stated.
Kaido literally explained awakening in detail, broke down the differences between Zooan, Paramecia, etc..., said "we call it", but you discounted him because Oda didn't mention he had it.