The conclusion is that there was established a hierarchy in the Church and authority - not each individual, not a democracy.
Christ is the head, the Holy Spirit guides His Church as the pillar and foundation of truth.
This is scriptural. Sola scriptura is not.
Again, Scripture as supreme upholds the magisterium and authority, but not as assuredly infallible, while under both models individuals must engage in interpretation, and there is division as well as unity.
The way souls came to believe on Christ is how truth and authority is established, and the magisterium must not be like the magisterium it dissented from, but look to Scripture as supreme and establishing truth thereby, not based on its claimed charism of infallibility.