We lucky we are the protagonists
But Zoro had a good point anyway, but i don't blame Luffy's reasonings or the fact Nami got pissed, cuz Vivi could really be in trouble and they promised they would be there for her in that case, and as of now they know nothing about how Vivi is doing..
Zoro already got neg diffed by an Admiral, he doesn't want that to happen again, so yeah he has a point