Didn't kidd say that not zoro.
Kidd said that not Zoro
Zoro never said that, he just said "what they should do to win", and reading their comments looks like BM/Kaido are synchronized, have synergy and protect each other very well.
Zoro: how can we win this
Luffy believes he can win this
Zoro thinking how to win: run out of methods to win
Luffy attacking recklessly with the same tired haki-depleted move with no need to strategize yet
Zoro agrees that they must separate the two in order to even find the chance
Luffy doesnt even think of using the different approach yet
Killer: kaidou is not human
Luffy: kaidou is human
Kidd: its hell
Luffy: been there
Yeah Luffy shows the contrast from everyone from SN. Kaidou acknowledge his will apart from many others. Luffy is truly built different even with his near-zero haki left