Many people rightly reject this argument, but it's difficult to precisely say why this must be false.
It's dangerous to accept Progressive Revalation and Religious Authority since the combination a fortiori creates a non-falsifiable belief system.
I am working on a formal philosophical paper intended for use in applying to graduate school which is called
"The Argument From the Failure of Religious Authority" (AFFRA) (Copyright 2009, lol)
This argument establishes a strong case that if the traditional theistic God were to exist it would be impossible for him to have an imperfect human authority. Also, if such an authority were to make an authority claim, then one of the following disjuncts must be true
God is not all-powerful or
God is not fully rational or
God does not strongly desire true beliefs to be propagated about him
God exists but the theism which entails the authority claim is false
It will make a strong case against JW's, Catholicism and any other theism which entails a human Religious Authority.