Who believes that? Can you cite a specific reference, from an authoritative source that echos that statement? If you're referring to the concept of the magesteriem, I would remind you that "who hears you hears Me".
“Who believes that[Scripture efficacy dependent upon consensus]?”
Catholic apologist all over the internet use the same assertion we saw here:
***where do you think you got the bible dear? That would be from the Catholic Church.***
“If you’re referring to the concept of the magesteriem, I would remind you that “who hears you hears Me”.
Getting from point A {Scripture} to point B {magesteriem} is a big leap.