Don't go passing your headcanon as fact
You don't even understand the point you are making.
Non of these mean powerscaling is based on narrative. In fact it proves the opposite.
These scenarios show that if you were going to powerscale Luffy I'm relation to Enel, Croc , Moria and Oars, Luffy wasn't stronger than any of them.
This shows your lack of knowledge about the manga.
Even Oda had to come out to state that there's no trade off when Luffy uses G4 that he can't move.
He can always move after G4 as the author and the manga states.
Therefore, the fact that he couldn't move against Doffy but could've against others is down to one thing "Damage"
That's why you fell victim to thinking the Tobi Roppo weren't defeated.
Everything is based on the plot. Powerscaling is based on the plot. Growth warranted by plot is always demonstrated / stated...growth warranted by fans is always based on headcanon