AHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAH
Must be the reason for having Luffy and Zoro being made a WG Supernova (Sanji is not) and being Kings who power up with Advanced CoC that "only a handful of the very strongest" (Sanji power ups with daddy Judge's tricks).
And for Zoro constantly defeating opponents stronger than the ones Sanji defeats, or defeating people that Sanji could never defeat in the same arc (Mr 1, Ohm, Kaku, Pica, King).
Or having massively better showing in the same arc (while Sanji gets raped by Doflamingo, Zoro defends from Fujitora even pushing the admiral back; while Sanji is clowned at his own game by Vergo holding back his CoA haki, Zoro trashed Pica even if the latter used his CoA haki; while Sanji does bondage with a Tobi Roppo, Zoro is covering his captain's back against two Yonkos, blocking the Yonko's combined attack and wounding and scarring a Yonko in a 1 vs 1 frontal clash, replying Oden's feat).
So... COPE HARDDDD