This is partly faulty logic. Kaido was the one their master fought and lost to after getting cheapshotted. Kaido is the one who is protecting Orochi and to get Wano back they need to first defeat him. The scabbards actually had an engament with Kaido's commanders so theres some history.
Zoro has never met Kaido, all he has heard about is Orochi and duplicity and his responsibly for Tonyausu's death etc etc. I think Zoro has a very good chance of cutting Kaido but, this is post ts OP we're talking about. Zoro failed to gather the Samurai so, his words are not always gospel. Interfernaces always happen.
The only thing to hope for is that Orochi is actually dead because if he is not, that would mean that Zoro has to go through at least 2-3 opponents one of them likely being a commander before getting to Kaido. We saw how difficult it was for Luffy to fight a YC4 like Doffy let alone Cracker. It took everything in him. Zoro isn't runnign through this Gauntlet (if Orochi is alive) and playing a major role against Kaido. If he does, then props to him and maybe Zoro boys were right about him coming out of TS stronger than Luffy.
