The entire fight was cheap drama that brought nothing new to Sanji‘s character. We’d already seen Sanji reject Germa thoroughly on WCI. Sanji’s big character dilemma of the fight was entirely redundant. The reader already knows Luffy would prefer him as a chef than a soldier. Sanji already knows Luffy would prefer him as a chef than a soldier. That’s the point of the scene where Judge slates Sanji at the end of WCI and Luffy says “why is he listing all your good qualities?”
As I said, the only good that came out the fight was destroying the RS, which in itself was just fixing the mistake made in Sanji ever wearing the thing.
Not even the tip of the iceberg. You havent even looked at it deeper.
Sanji is dabbling with the idea if Luffy would want a cold merciless soldier who can defeat anyone, or himself that would lose to any opponent which is a woman. Prior to this fight, Sanji got his ass handed to him by Black Maria, got himself injured and nerfed, and wasted time being captured by her crew. However with the Germa boost he got new powers that not only aid him combat, but eventually allows him to gain the power to stop being useless in scenarios such as Kalifa, Pudding, Viola and Black Maria. Where hes at the mercy of women.
In turn of Sanji gaining immunity to his woman problem, he would have to trade his heart and morals all together. This isnt only a “Sanji rejecting Germa ideals“ scenario. Its Sanji literally debating which version of himself is better. And by the end of it he decides his current self, the man who was crafted by Zeff to be superior. Even with his flaws, he cannot lose the heart his mother gave to him….no matter how much more useful he could be. Thus by the end of it, he doesnt reject Germa….he rejects the possible “better version” of himself…destroys the RS which is a strong PU…..and decides to rely on himself to win.
Whether he turns into evil Sanji or not isnt really relevant. But Sanji’s resolve was to defeat Queen by himself before he turned emotionless and loses himself….something that he believes could happen to him.