And that's one of the essential flaws of Sola Scriptura . It is not so much that Protestants disagree on some things, but that no issue can ever be authoritatively resolved because they do not have a unifying authority as we Catholics do. Once the Pope makes an ex cathedra pronouncement, that's it. The case is closed. No further discussion.
Protestants have no final authority other than their own interpretation of Scripture.
Hence the two cases are not analogous and no parallel can be drawn.