I guess it was just a tool to make the internal conflict more dramatic. Like if it had just been Sanji debating about whether to accept the PU or not with zero real consequences just because he didn't want to be associated with Germa, it would've been way less impactful. But now that the moment has actually passed, it didn't really matter in the long run, but DURING the process it made the moment in chapter 1031 way better