Sketch, the Catholic Church is the ancient name of Christ's Church, surely some Orthodox wish to be associated with the name at least.
“[T]he Article, In one Holy Catholic Church,’ on which, though one might say many things, we will speak but briefly. It is called Catholic then because it extends over all the world, from one end of the earth to the other; and because it teaches universally and completely one and all the doctrines which ought to come to men’s knowledge, concerning things both visible and invisible, heavenly and earthly… for this cause the Faith has securely delivered to thee now the Article, And in one Holy Catholic Church;’ that thou mayest avoid their wretched meetings, and ever abide with the Holy Church Catholic in which thou wast regenerated. And if ever thou art sojourning in cities, inquire not simply where the Lord’s House is (for the other sects of the profane also attempt to call their own dens houses of the Lord), nor merely where the Church is, but where is the Catholic Church. For this is the peculiar name of this Holy Church, the mother of us all, which is the spouse of our Lord Jesus Christ, the Only-begotten Son of God.” Cyril of Jerusalem, Catechetical Lectures, 18:23,26 (A.D. 350).
“We must hold to the Christian religion and to communication in her Church, which is Catholic and which is called Catholic not only by her own members but even by all her enemies. For when heretics or the adherents of schisms talk about her, not among themselves but with strangers, willy-nilly they call her nothing else but Catholic. For they will not be understood unless they distinguish her by this name which the whole world employs in her regard.” Augustine, The True Religion, 7:12 (A.D. 390).
"For in the Catholic Church, not to speak of the purest wisdom, to the knowledge of which a few spiritual, men attain in this life…–not to speak of this wisdom, which you do not believe to be in the Catholic Church, there are many other things which most justly keep me in her bosom. The consent of peoples and nations…so does her authority…the succession of priests…[a]nd so, lastly, does the name itself of Catholic, which, not without reason, amid so many heresies, the Church has thus retained; so that, though all heretics wish to be called Catholics, yet when a stranger asks where the Catholic Church meets, no heretic will venture to point to his own chapel or house. Such then in number and importance are the precious ties belonging to the Christian name which keep a believer in the Catholic Church" Augustine, Against the Epistle of Manichaeus, 4:5,5:6 (A.D 397).
You can today test the phenomenon that these early Catholic Bishops experienced. Ask in any town or city when travelling where the " Catholic Church " is, and see where they direct you.
The thing with private interpretation, is that it does not have the benefit of the context that tradition brings. Tradition understands things as they were originally meant, with no modern misunderstandings.
Luke 20:43 – Jesus says, “take your seat at my hand until I have made your enemies your footstool.” Jesus is not going to require the apostles to sit at His left hand after their enemies are their footstool.
2 Sam. 6:23 – Saul’s daughter Micah was childless “up to the point” [until] her death. She was not with child after her death.
It is quite reasonable today to assume something after when the word " until " is used. But in ancient times the word " until " didn't infer anything after. This is the danger of interpreting as a modern that does not know how these terms are used in ancient context.
Tradition prevents modern twisting of scripture, that leads people to misunderstanding.
Catholics have one ancient Apostolic understanding of Scripture, it has always been forbidden to privately interpret Scripture.
The fastest way to twist scripture to people's destruction is to privately interpret it, that is why Protestantism is so divided because it means anything the reader wants it to mean.
Protestants today think it is normal to privately interpret scripture, subjecting scripture to each man's conflicted opinion, but this is a spiritual crime against the truth.
Let us forget that the founders of Protestantism believed Mary was ever virgin. Let us forget that every preceding age of the Church back to the Apostles also believed Mary ever virgin.
Let us assume that they are all stupid and never read the scripture, no matter that they were great Fathers, leaders and scholars of the ancient time.
Many times I see Protestants reduce scripture to legaleez, it's just there to proof text their doctrinal position, like Pharisees and Sadducees quibbling over trifles and they miss entirely the most amazing and profound treasures of scripture.
Private interpreters of scripture can never in a million light years truly grasp scripture.
Tradition or another term for it, the Spoken Word of God, the Tradition of The Holy Spirit , teaches one and the same interpretation handed down throughout the ages. It is not the shifting sands of the traditions and opinions of men.