so what? It was still a fight main or not. Sanji vs king wasn't a main fight either and king still no diffed him, it's a good way for oda to portray power levels.
Can you all stop with this b*llshit of King neg diffing Sanji?
It was already debunked and when It happened you all downplayed King.
Sanji wasn't focus on his opponent, King could grab his neck because Sanji had Momo, when the cook throwed the kid then King transformed in his animal form and his beck was already on Sanji's stomach because previously in his Human form he had his hand on his neck.
King would have never had the opportunity to use his beck on Sanji's stomach If Momo wasn't there.
Same thing that happened with Luffy and Zoro when they were crying in pain when Queen got them in his mouth and then throwed them in the ground, something that would never happen in normal conditions.
So no, King would never have displayed his Attack in normal conditions and even though he displayed It at the end he did 0 significant damage to Sanji thanks to raid suit.
How can you call this neg diff?