Sanji is just naturally meant to achieve utmost greatness
He doesn't need to be saying that the whole time. Everything we get from Sanji im the story has a link to something we already saw in the past, but for some reason they think that Sanji getting such moment, both before and after everything sets up, means literally nothing
Zoro fans denying this is just their daily way to cope by pretending Sanji is not him.
Similar to the "Romance Dawn Trio fans"
They force Romance Dawn being even better or more proeminant than the Monster Trio/Captain and Wings dynamic, that we can already picture in the first 100 chapters of the series.
70% of them are Zorotards pretending to be huge Nami fans because she is somehow more important than Sanji to the story or something.
(like that even changed something in the grand scheme of things)