Truth is not decided by consensus.
I heartily agree. Neither is it decided by each individual. Even the Reformers realized this very early on - it's why they created their various Confessions, Principles of Faith and so on. They even split from each other numerous times over disagreements on who's interpretation of scripture, via sola scriptura, was correct.
If you don't know WHY they existed, then you don't know IF they are STILL required today. Rightly dividing God's WOrd of truth works when it's actually tried....2 Tim 2:15. Either GOd meant what He said when He said ONE, or He forgot there were more.