Because I never gave a shit whether Zoro fought Kaido or not 
Though I guess it's a good compensation for you to finally have a credible hint leading to Zoro participating in the group fight against Kaido(where Luffy would outshine everyone anyway) after the the realization that Zoro's ultimate goal is weaker than Kaido

Though I guess it's a good compensation for you to finally have a credible hint leading to Zoro participating in the group fight against Kaido(where Luffy would outshine everyone anyway) after the the realization that Zoro's ultimate goal is weaker than Kaido
