If they are arguing about Shiryu it means Shiryu is making them uneasy.
A possible confirmation that he is stronger than Admirals is upsetting for many.
Egghead is perfect opportunity for Zoro to show yall that he can take it and that he can beat an Admiral before Luffy.
Why cant you agree with that when the strongest of them all, Kaido himself, said that Zoro belongs to a handful of the very strongest?
Or when he said that with Zoro's strength on his side, he could conquer the world?
While aCoC is ability of handful very strongest, Zoro's King of Hell is even a step above that.
I dont know how anyone can still doubt Zoro's strength. The guy is built to win, not to fail like his captain does countless times per fight.
It was a dream in the sense of us dreaming about Oda's writing being good...