Simple Faith can overrule great scholarship every time. John was not the brightest bulb in the pack nor was he a promising candidate for the priesthood. But that is not the point. "Consider your own calling, brothers. Not many of you were wise by human standards, not many were powerful, not many were of noble birth. Rather, God chose the foolish of the world to shame the wise, and God chose the weak of the world to shame the strong, and God chose the lowly and despised of the world, those who count for nothing, to reduce to nothing those who are something, so that no human being might boast before God." (1 Corinthians 1:26-29)
There is nothing so great as the Eucharist. If God had something more precious, He would have given it to us.