Sanji's Baratie character arc revolved around taking that first step towards following your ambitions/dreams, even if it means death. It's what he learned from Luffy, it's what he learned from Zoro, and it's what Zeff has been subliminally lecturing him on all throughout the arc.
So ask me, what sounds better: Sanji remaining consistent with his character growth from back in Baratie, or regressing for the sake of a life that's already secured due to plot armor?