A very firm rule in Canon law since ancient times is the idea of “One Bishop in one city.” Well, if the Pope has universal jurisdiction over the church, then in essence he is a Bishop over all his other Bishops, and he is a second Bishop in every city.
Arguably, by this line of thought, the fact that synods, and even more so, ecumenical councils, can exercise authority over local Churches / bishops, suggests that every bishop of the synod / council is a “second bishop” in the local Church…so I respectfully would reject this particular objection to the papacy. Vatican I defined the dogma of papal primacy; Vatican II elaborated upon it. Vatican II is clear to state that every bishop is a vicar of Christ, and
not a vicar or deputy of the Pope. Yes, the Pope of Rome, like an ecumenical council or a synod, does exercise an authority over the entire Church, but he never replaces or supplants the role of the local bishop as vicar of Christ for his own Church.
Ironically, I get the impression that in
some ways the average local Catholic bishop is more autonomous than the average local Orthodox bishop…as a direct result of the gradual degradation of local primacy / synodality in the Western Church. The tendency to gradually emphasize papal primacy at the expense of local primacy has, counter-intuitively, actually increased the autonomy of local bishops…after all, how can thousands of bishops around the world actually report to one man? They can’t. Its nonsense. Thankfully, since Vatican II, we have seen a gradual restoration of local collegiality… the Orthodox Church must, in my humble opinion, restore universal primacy, while we must restore local / regional primacy… ideally there is a true synergy between the Christ-given autonomy of the local bishop, as vicar of Christ over his particular Church, the regional primacy of the synod/metropolitan, and the universal primacy of the Bishop of Rome… at all levels - local, regional, and universal - let the body do nothing without the head, and the head do nothing without the body.