You realise that's because from the get go zoro was saving himself from kaido.
Why wouldn't the tools to deal with big mom and kaido be effective against Jack?
Jack who doji easily ripped through and had to be saved from death after 1 hit from the sulong dukes.
Zoros ap is more than enough to beat Jack
Never said Zoro doesn't have AP to beat Jack lol, I'm saying if it is to happen,Oda is not going to draw it as an easy fight.
If the attacks that threatened Kaido were to land on Jack,he would be badly injured thus Oda will not let it happen at the beggining of a Jack vs Zoro fight unlike what is happening on the roof top.
Oda is deliberately having Zoro look good against both Kaido and Big Mom because he knows they are stronger and will have the having the upper hand later,unlike if he was to draw a fight against Jack whom he knows Zoro can beat(but will still want to portray it as a relatively tough fight since Jack is a Yonkou commander).
Instead i think Oda will be having Jack dodging or attempting to block hits instead,that's what I'm saying.
At the end the fight will be looking like a low high diff fight imo.
I'm not changing your mind on anything,we can disagree just fine.