I do understand that and i agree with it in a narrative sense.
But as an One Piece and also a MCU fan, i know that when you have a huge list of important characters in a story, you give each character at least one good moment and only a few of those characters, the most important ones, two good moments and SOMETIMES three good moments. There just isn't enough screen time for everyone.
So if Oda already gave Zoro: defeating Apoo temporarly to get the antitode, destroying Queen's gun, going to the rooftop with the rest, blocking and tanking hits from Big Mom, saving Luffy a bunch of times, cutting Kaido with tatsumaki and Asura, CoC confirmed and all this good stuff. When i see Zoro getting healed one more time, i don't know if there's enough screen time left or my boy to get BOTH King and Kaido.
I could see him doing one of the two, but both seems OVERKILL considering how much Oda already gave Zoro and there's a lot of characters that still didn't do shit in the arc. Like Yamato, Brook, Usopp and the list goes on.