We understand that is Rome teaching.
We also understand that the Bible indicates something different.
Others like you presume it indicates something different.
Consider this: the foundation of Christianity was built on Peter and through the Church Fathers. Heresies came and went.
When Luther hit the scene, he not only acknowledged the Church Fathers, but commended them for study.
Now, the quandary non-Catholics have is whether to accept what the Church Fathers taught or not. If they were wrong about one element, how can they be right on another?
Fundamentally, where does one start disagreeing with the Catholic Church? Is it 393 with the close of the Canon? Is it the Council of Trent? When did the Church go wrong, and how did it happen?
Does one agree with the Apostle’s Creed? How about the Nicene Creed? Luther wanted to pick and choose, the same with the other Reformation-era people. With no authority, they disagreed with each other and splintered into a number of disagreeing factions.
If one denies the Church Fathers, then they deny the fundamental teachings of Jesus Christ, past by oral tradition. St. Ignatius of Antioch was a disciple of St. John the Apostle. He taught what was taught to him, and was Bishop of Antioch. It doesn’t get much more apostolic than that!
Here are few words from him:
“”And from the prince of this world were hidden Mary’s virginity and her child-bearing, in like manner also the death of the Lord.” The doctrine of the Trinity, too, he plainly takes for granted, and we detect an approach to later definitions of Christ’s nature when we read in the same letter: “There is one Physician of flesh and spirit, begotten and unbegotten, God in man, true life in death, son of Mary and son of God, first suffering and then beyond suffering, Jesus Christ our Lord.” No less remarkable are the phrases he uses to describe the Eucharist. It is “the flesh of Christ,” “the gift of God,” “the medicine of immortality.” Repeatedly he emphasizes the loyalty and obedience due the bishop as the transmitter of true apostolic tradition, and the necessity of unity and peace. Finally, it is in his letter to the church of Smyrna that for the first time in Christian literature “the Catholic Church”[6] is spoken of. “Wheresoever,” he writes, “the bishop appears, there let the people be, even as wheresoever Christ is, there is the Catholic Church.” Ignatius’ martyrdom and his important contribution to the development of Church doctrine make it fitting that his name should occur in the Canon of the Mass.”
So, a disciple of the John the Apostle taught Mary’s virginity, the Real Presence, and spoke of the Catholic Church, all less than 75 years after the Resurrection.
These are the teachers of Christianity, preserved and passed down by the Catholic Church. It is up to you to agree or disagree.