If Zoro wasn't on the roof, Sanji stans wouldn't give two shits about it.
If Zoro wasn't part of the Worst Generation, Sanji stans wouldn't give two shits about it.
If Zoro wasn't portrayed to end the story as one of the strongest people in the verse, Sanji stans wouldn't give two shits about it.
Comes back to the flawed idea that "If Zoro can, Sanji can too".