As far at the Catholic prayer goes, they represent church beliefs. Like I said, I don't doubt that church organizations came adhere to beliefs (some that have dubious scriptural backing).
So for me, I still don't see any explict scriptural reference to Mary remaining a lifelong virgin, and extrapolating other references to that situation is dubious at best - there is explict scriptural reference to being fruitful and multiplying, as well as establishing a carnal relationship with a spouse - to me, that's not notably corrupting.
John xx, 30: Many other signs also did Jesus in the sight of his disciples, which are not written in this book.
John xxi, 25: 25 But there are also many other things which Jesus did which, if they were written every one, the world itself. I think, would not be able to contain the books that should be written.
2 Thessalonians, ii, 14 Therefore, brethren, stand fast: and hold the traditions, which you have learned, whether by word or by our epistle.
The Church gave us the Bible, not vice versa.
Sacred Tradition gave us Sacred Tradition, not vice versa.
The various writings of the Old and New Testamenta were not compiled together except through the labors of Saint Jerome and the inspired declaration of the Church, in Council, as to the authenticity of each item - well over 300 years after each of the Gospels were written, as well as of the Resurrection of Our Lord.