"If Sanji was that guy?" What guy? "Wings of the Pirate King?" He literally is. This is a stupid argument where you're trying to argue a fact.
If you cannot understand it, you are literally Black Maria. That's you. Next chapter Robin will beat you and move on.
You have built an argument based on deliberately misunderstanding what Oda wants to do with Sanji and ignored his narrative choices.
Sanji has always been "that guy." And you cannot ear your cake and have it, if you want to bring up bounty (which is 100% the only meaning of Supernova), then Sanji's bounty is >= Zoro, so what're you talking about?