Damn over a thousand chapters later and people still don’t see the recurring theme of the series? This is just a response to the Zoro fans who are constantly trying to prove Zoro is above Luffy. Like every single arc Luffy took on the strongest. In every major faction. If Luffy couldn’t do it, why is it emphasized as if he is the only one to be able to do it? Not counting just shonen battle manga basics like OP. Main character takes on the strongest most of the time (of course doesn’t have to but ya know who’s story it is)
Anyway, Kizaru is too much for Zoro. I agree there should be a confrontation but he’s definitely not having an extended fight here and he would lose. Luffy is the only one here who can take out an admiral. He’s had plenty of skirmishes and beef with admirals, way more than Zoro. It’s an obstacle to the pirate king yonko, not the first mate/right hand to look good against one first.