Well this is very true, also.
But I won't say disliking the idea can't make sense. It's the Luffy show and people want the same program they've been watching for virtually 25 years. It's Luffy's opponent, and if he can't do this then what's the point?
Obviously I disagree. To begin with, Luffy wants to fight for himself and wants to win, but doesn't claim Kaido. He was clear upfront that Lucci and Crocodile were his opponents and reiterated that through his struggles with them. With Kaido, he starts by saying he wants to join Kinemon and the others. If he understands that someone else wants a piece, he'll respond accordingly. Knew nothing about the personal history but still let Law attempt the final hit on Doflamingo, for example. Not only did he want to join Kinemon, but he was totally fine with Zoro joining him for the fight with Kaido.
Which has been Zoro's recurring pattern throughout the arc. He begins the raid by finding Luffy even when others mention that he shouldn't be able to do so. He saves Luffy from the dog pile started by Apoo. He saves Luffy when the fight actually starts, shields him from the Boro Breath even though Luffy fails to respond in kind by tanking Indra, sacrifices himself to Hakai and still manages to save Luffy again after that. That's aside from making a hazardous deal to take down Kaido's best man. When does another shot start becoming a right that he hasn't earned?
Luffy's had his chance. Several. And no, landing another Kong Gun wasn't gonna seal the deal LMAO. He literally just admitted that he believed he lost until his fruit awakened to give him another shot. If you believe that getting downed by Kaido means he'll get up again, even if he's presented as DEAD, why does it seem impossible that Zoro will get up and do the thing he's been committed to doing this entire time?