When they say "Zoro will fight King" what they mean is "Zoro won't fight Kaido".
Just a few months ago it was "Zoro will fight Orochi" and they meant "Zoro won't fight Kaido or King".
They don't want Zoro to do well, they just know that at this point him fodderizing KING would be the LEAST impressive thing he could do given of things are going right now
Zoro's main fight is KAIDO and BIGMOM, not a mere YC1