Catholics acknowledge that there are questions such as this that are left unanswered by the Bible itself.
Do you realize that the majority of what your church believes and teaches is based on what the Bible DOESN’T say? And what fallible men have decided it MEANT to say, or said between the lines of Scripture?
Protestants seem to believe God hijacked Mary’s body. That is, of course, consistent with their belief in active predestination. In the Protestant model, there is no free will - God possesses humans as an external agent and turns them into zombies. So much for the virtues of obedience and love - they can’t exist in the Protestant model.
That of course makes the Scriptural references to Christ’s obedience to His Father a lie.
Such are the logical and necessary conclusions of believing Mary is not a cooperator in God’s redemptive plan.
As for the denial of oral tradition, it is also a rejection of the New Testament, which originated in oral tradition. It makes a mockery of St. John the Evangelist’s assertion that most of what Christ said and did is not written, in turn suggesting that those other acts and words are not important, in spite of their originating in God’s Word.
Without the Catholic Church and it’s oral tradition, there would be no New Testament (and no Christianity)- unless one believes that God presented the bible directly to Luther in the form of the KJV and started his Church thence.
Some key lines from Scripture (from the KJV) that we Catholics take literaly:
On Mary the Mother of God:
Luke 1:41-43: “And it came to pass, that, when Elisabeth heard the salutation of Mary, the babe leaped in her womb; and Elisabeth was filled with the Holy Ghost:
42And she spake out with a loud voice, and said, Blessed art thou among women, and blessed is the fruit of thy womb.
43And whence is this to me, that the mother of my Lord should come to me?”
On Catholic Oral Tradition:
John 21: 25 “And there are also many other things which Jesus did, the which, if they should be written every one, I suppose that even the world itself could not contain the books that should be written. Amen.”
On the virtue of obedience (we are not zombies), first of Christ’s obedience to the Father:
John 12: 49 “For I have not spoken of myself; but the Father which sent me, he gave me a commandment, what I should say, and what I should speak.”
Luke 22: 42 “Saying, Father, if you be willing, remove this cup from me: nevertheless not my will, but yours, be done.”
Then on Mary’s obedience and her cooperation in God’s redemptive plan.:
Luke 1:38 “And Mary said, Behold the handmaid of the Lord; be it unto me according to thy word. And the angel departed from her.”
On Mary’s role in dispensing God’s grace:
Luke 1: 44-45 “For, lo, as soon as the voice of thy salutation sounded in mine ears, the babe leaped in my womb for joy.
On Mary’s Faith, Obedience, and her subsequent blessedness:
Luke 11: 27-28 “ And it came to pass, as he spake these things, a certain woman of the company lifted up her voice, and said unto him, Blessed is the womb that bare thee, and the paps which thou hast sucked.
But he said, Yea rather, blessed are they that hear the word of God, and keep it.”
Luke 1: 45 (Elizabeth to Mary:) “And blessed is she that believed: for there shall be a performance of those things which were told her from the Lord.”