(Catholic Encyclopedia)
http://www.newadvent.org/cathen/11703a.htm
But most deplorable of all persecutions have been those that Catholicism has suffered from other Christians.
I agree that there is no division in the Body of Christ--both priests and the laity (lay people, as distinct from the clergy) are included.
Yes, the Catholic Church has a hierarchy and some interesting titles---it's somewhat more efficient than "Non Laity Person 1 who is the local head of this group of persons," Non Laity Person 2 who is the local group of this other group of persons," etc.---Don't you think? I mean, there are more churches than at Corinth and Rome these days.
Of course we Catholics have strong feelings for Mary. It was through her that God brought forth the Redeemer of Mankind who---to be the perfect sacrifice--- must not have been subject to original sin. Personally, I live in the acknowledged presence of the Father, Son, and Holy Spirit daily; but since my mother was probably was not the best example of motherhood, it's good that the church reminds me of the great importance of Mary in salvation history and the appropriateness of my being reminded of that occasionally.
So, would you realistically expect that Paul would have added "except for Mary which of course goes without saying" in an effort to be consistent at the end of the verse you quoted? And Luke 1,3 "....I too decided to write an orderly account for you..." does not indicate that Luke intended his gospel become a theological treatise that anticipates and provides the answer to every question you as a current reader might ask.
And that, of course, is most like because Luke knows that the Holy Spirit was sent for that purpose anyway.
Why do you assume that because nothing was added about Mary's virginity after Jesus's birth that it did not continue? I like this summary: Jesus is Mary’s only son, but her spiritual motherhood extends to all men whom indeed he came to save: “The Son whom she brought forth is he whom God placed as the first-born among many brethren, that is, the faithful in whose generation and formation she co-operates with a mother’s love.
And I don't read your propaganda, so I won't waste my time posting my explanations either. But here's something you may want to think about: And the priest said to Joseph, You have been chosen by lot to take into your keeping the virgin of the Lord. But Joseph refused, saying: I have children, and I am an old man, and she is a young girl. I am afraid lest I become a laughing-stock to the sons of Israel. And the priest said to Joseph: Fear the Lord your God, and remember what the Lord did to Dathan, and Abiram, and Korah.
Again you are parsing according to your inclination---what precisely does "perish" mean? Does it refer to the soul or the body? And what's wrong with holding Mary in the same high regard in which Jesus himself holds her?
Sorry, but I have already discovered the "pearl of great price" and quickly bought the field many years ago.
I just can't see trading it for your swamp land with the plastic diamond ring.