Idk but GV Kaido & BM fans used them facing Imu was a proof they were above everyone else that wasn't (like Rayleigh, Gaban, Shiki).
Turn out they were just hype tools
Kaido at least has the excuse of being a rookie who just got his DF.
Anyone with a brain knew he would be hype tooled sooner or later. Even Kaido fans smelled it, they just wanted him to have some shine before that (which he kinda did).
I wonder what would be the excuse for Big Mom lmao. She is almost 30, should be kinda close to her prime.
At the same time, Oda didn't write Whitebeard be a hype tool.
I was saying this a couple of chapters back as well.
Rocks basically asking Whitebeard to escape, while Whitebeard staying back out of loyalty alone by chalking up some excuse was a character moment. It was Oda rubber stamping that Whitebeard was the true first mate, and that he was also built different.
This is twice that Oda refused to hype tool Whitebeard by the way. Last time was with Garp.