Luffy can't even kill one giant sea king in fmi they pissed their pants when one (extra slow uno) was passing their ship as their where submerging lmao
Also no it isn't true, Kumawas an ally too both in TB and a sabody
shirahoshi can't even control her power how would she be able to call sea kings before luffy kill her ?
Kuma was not a ally in TB he did not fight with them or help save the people there .
Dude just test his crew and leave , it the same at Sabody where ray also help where the whole point was for them to lose .
There were not there as allies to help save country or person along with the SH which is what elbaf is which is the most important aspect .
Like how we saw in many other arc last 3 being Egghead , Wano and WCI.