All I’m saying is that Roman Catholicism (traditionally) does equate itself in totality with the True Church. But IF (and this is an important IF) it is going to do that, then they must -at some level - be infallible in determining dogma and doctrine. If not, then at any point (including the early history of the Church), fallible men could pervert the teachings of Christ without repercussion from God and lead all future generations’s of men and women astray with false doctrine.
To put it another way, would Christians of all modern denominations say that God spoke to the Apostles and Early Church Fathers, but they all largely chose to ignore God AND God simply permitted them to ignore him without “righting the ship”’. It’s unthinkable if we are to maintain the integrity of teachings going back to Christ. Furthermore, it seems incomparable with God’s Providence to hold that only a small group of people through time have taught “True Christianity”, while the vast majority of those wishing to be Christians have practiced falsehood.
Paul warned that those who add anything to faith in Christ alone for being born again, that is anathema. Catholic Apologists are all over the map when one cites the sacraments as Catholic necessity to be among the 'going to heaven'. They even use the 'sin of presumption' to stear adherents from the joy of knowing in the here and now that their personal belief in Jesus as savior and Lord has them individually counted among the born again. Catholicism PRESUMES one cannot know they are heaven bound until they have been faithful to the sacraments! And even then at death they have been taught that their soul goes to 'purgatory' for final cleansing before Heaven is a reality for them.
The WORK that Jesus did suffering on that cross for them is then twisted to infer they must suffer in purgatory to be worthy of heaven. THUS the time in purgatory is infact works, to obtain eternal reward.
Salvation is by faith alone in Christ alone, with no works of suffering in a mythical purgatory to be clean enough for Heaven. Roman Catholicism is an anathema to Christ alone.