If you think about, Oda cut Jinbe out of purpose from the strawhats until the WCi arc come into the game.
If Jinbe would already travel with Luffy after the Fishman island, the balance between the crew and for the arcs would be out of the story. Since Jinbe is to strong to get wasted for Punk hazard(the only one who could match Jinbe could be Vergo) and even for Dressrosa(only one who could match him would be Doffy and probably Burgess but both had their hands full with Luffy/Law and Sabo, so it would be a overkill if Jinbe would be in DR, it is like a second Doflamingo would be in Luffy crew based on power).
Same Jinbe is now fighting for a hour against WsW, showing how powerfull a Yonkou crew is. Jinbe come into the game when the battles with the Yonkou start, he was to strong so Oda cut him off PH and DR arc because he would not fit into the narative of the powerscaling from Oda.
My boy WsW fighting equal against such a monster is a good proof how strong Kaido members really are.
And WsW is the 4th strongest, showing that the calamity are monsters on their own.
Soon the disaster going to happen.