So you don't believe that Lucci Zoan form is irrelevant when any Zoan forms have been inconsequential pre timeskip
As i understand it, you're trying to invalidate the fact that Kaido switched forms to tank a stronger attack, am i correct?
About the Dragon form, is it stated anywhere as well that's Kaido's most durable form?
Then what's your speculation about Jinbei and WhosWho, why he's fighting him in Human form when he was in Zoan form earlier?