Yes. - And I would say you are wrong.
I could well make your same doctrinaire arguement about Christianity as a whole, and you would refute my accusations of “arrogance” with what -
I can tell you at the church I attend, a member of the SBC, I have never heard leadership or a congregant state that we are the One True Church and all others are heretical. We believe Christ died for our sins on the cross and arose again on the third day, just as the catholic church believes, but we are not vainglorious in our belief that other Christian demoninations are heretical. We pray for those that have a false sense of righteousness and stray from biblical truths.
You most certainly are vainglorious. In the same way some supercilious pew warmer is when they catagorically say something like “Pat Robertson doesn’t speak for God!”
What such people fail to realize is in order to say someone else is speaking without authority, they are implicitly claiming for themselves the same authority, albeit in reverse, they are denying to the one they are denouncing.
You can not overturn the decision of a judge unless you are a higher judge.