Well, considering the list of things that Catholics believe that are not mentioned by name in the Bible, that reason does not hold water. That leaves only *Sacred Tradition*, which is simply church opinion.
It seems to have originated with Luther.
*Seems to have*? Are Catholics not sure and just blaming Luther for everything they don't like that disagrees with Catholicism?
Is he just a convenient scapegoat?
Luther's immediate followers (in the early 1500s) explicitly promulgated "the Bible alone as the sole rule of faith." There are no citations of Luther having promoted the theory explicitly, but it can be deduced from his other writings.