It all stems from caring too much for strength depiction to the point where you fully ignore what's actually going on in the narrative. Page 1 wasn't meant to be defeated that early. Showing off Sanji in Germa tech, while making Page 1 look formidable was the point. If Sanji gets his fight of the arc and loses, then that warrants questioning, but this is just the early stages of the arc where a display of strength is shown.
There are points where Kuzan outclass Sanji, Luffy and Zoro and even when Cipher Pol tossed the crew around before Ennies Lobby. Page 1 vs Sanji isn't either of those. All of those instances have a point to make. Show off how formidable the opposition is. The 1st taste of an admiral b4 MF and Cipher Pol b4 they are defeated. The difference is neither Sanji nor Page 1 were depicted as definitively lesser than the other. It's just exaggeration by power scalers relying on strength depiction as if there is no other purpose for them clashing.