Plot issue, the marines can't even deal with the Shichibukais even though they're already enjoying the new VEGAPUNK inventions which were the cause of the replacement.
KAIDO and BM without the intervention of Luffy + allies, would run wild around the world at that moment and the navy would do absolutely NOTHING as:
SAKAZUKI himself "mentioned" :
"We will leave WANO in PEACE!!! We don't have the resources to diverge here, sengoku!!!
And let's not ignore KAIDOU's phrases about conquering the world either, I mean he doesn't seem like an idiot to say something like that if he didn't have a chance, allying himself with BIG MOM and recruiting the newbies. This is said by an emperor of the SEA.
And since it's about
conquering the world, he's taking the
navy and its forces into consideration. LOL ,and it's not that the last concern of KAIDO and BM is the
navy or the
government, they would have to destroy the last
2 emperors remaining (Shanks and BB), navy and government, and whoever
opposes them, that includes the
revolutionaries. LOL
I love how these guys add up ignoring the claims of KAIDO and BIG MOM and AKAINU himself.


