It's because their problem isn't with people thinking that Ray and Gab are equal, but it's with Gaban or Sanji or any Sanji parallel having any relevance or relativity in anyway shape or form with Zoro or his parallels or even in the story as a whole. Which is ridiculous knowing who Sanji is written to be in the story. That's why they'll always be wrong; if they said Ray is the number 2 and stronger, then that's not even a point of contention but that's not enough for them, they want Oda to completely change how he views certain characters, their importance and dynamics.