Yeah, but they're allowed to have opinions of their own? Who cares what that guy says. It's not like he controls the manga.
I don't think you get my point. Yes, Kishi's assistant can have his own opinion, but you have to look logically at it too. If he's aware of the ending and therefore the end pairings, he probably wouldn't imply things like Naruto not chasing Sakura if the ending is positive for them. I'm not saying this confirms anything, but its not something to take so lightly either.