No, that is erroneous and contradictory. If the Catholic Church were the One True Church just because Christ was Operative in our Church, and not also because of the teaching authority of the Pope, then given the Orthodox also have “Christ present and operative in these Churches,” they would also be part of the One True Church.
However, the Orthodox Church is in Schism. From the Council of Florence, only the Catholic Church can lead to Heaven. Therefore, since salvation is only possible through the Catholic Church (not the Orthodox Church), this must necessarily imply that the Catholic Church has something that the Orthodox Church does not. This is the Keys to the Kingdom of Heaven and the teaching authority of the Pope. The only path to salvation is through the Catholic Church. The Orthodox Church is not a pathway to salvation. The opposite of salvation, not salvation, equals hell. That is, the Orthodox Church is a pathway to, in the words of the Council of Florence, the “everlasting fire which was prepared for the devil and his angels.”
No, it’s not “secondary,” it is an “essential and integral part of God’s plan.” It is the very reason that the Orthodox Church is in schism. Stop downplaying schism, refusal of submission to the Roman Pontif, and pretending as if it’s only “secondary.” If it were not that important, why does it lead to hell? Why did St. Thomas think that even the lesser sin of heresy (compared to schism), deserved the death penalty?
Finally, that is an absolutely astonishing statement! I am merely using the exact same word choice of the Council of Florence, verbatim. Are you accusing the Council of Florence of being misleading? It’s infallibile, our Church would never mislead people. I’ll repost it, so people can see you are making repeated false accusations. There is nothing misleading, I am using the exact language of the Council.
“[The holy Roman church] firmly believes, professes, and preaches that all those who are outside the Catholic Church, not only pagans but also Jews or heretics and schismatics, cannot share in eternal life and will go into the everlasting fire which was prepared for the devil and his angels, unless they are JOINED to the Catholic Church before the end of their lives; and that nobody can be saved, … unless he has persevered in the bosom and the unity of the Catholic Church (Session 11 — Feb. 4, 1442).”