This particular situation might be confusing: two unique people, who seem to have truth from God are both preaching and baptizing. John the Baptist notices that people seem to be more drawn to Jesus. John's disciples notice, too. John the Baptist reminds them and us that he is not the Messiah, but that he was given the task of proclaiming His coming. He uses the analogy of a wedding. In our terms, John the Baptist is saying that he is the best man. The best man's job is to celebrate his friend, the groom, and to do whatever he can to help the guests celebrate and enjoy the wedding. Our culture isn't much different than theirs in this. The best man is usually the closest friend that the man getting married has in the world. Any solid best man will be thrilled for his buddy, and once it's over, his job is done. That's exactly what John the Baptist is saying. There is a fair amount of discussion about whether verses 31 through 36 is still John the Baptist talking, or ...
Catholics can have conversations among themselves concerning the ingenuity of a living Magisterium that can answer higher order questions that the Bible text itself cannot answer, because the purposes of it and parts of it are legion. But as a matter of faith, the relevant questions are these: Did Jesus establish a visible Church united in governance, sacraments, and profession? Is your local Catholic parish a current outpost of that Church? What might I expect to find if the answer were "yes"? What would invalidate the claim, or at least serve as a significant rebuttal to the claim? You see, it doesn't actually matter if one paradigm of the story of God interacting with humanity has features that someone finds appealing or advantageous. The only real question is whether Jesus established that putative Church and the features that are helpful, advantageous, or however you might describe them. Christianity and religions related to it presuppose that God reveals things tha...