zoro even in a healthy state
stands no chance but atm he is near death
most of kaido's forces are down now
main fighters who still have some energy left and if luffy regains consciousness should lend their support .
no one in this alliance alone is the solution to kaido . that's the point.
I know that Zoro shouldn't be able to fight, neither is Luffy but he had a thousand chances. Time for someone else, as much as I'm disappointed, I wanted to see him win. It didn't happen, let's move on.
I also hate group fights and prefer 1v1 so only guy left that I can enjoy seeing fight Kaido is Zoro. It's as simple as that, I don't care if it makes sense or not.