The hymen was not destroyed, miraculously. You don't have to believe it, but the Church teaches that as a historical fact.
By the way, were it recorded in the scripture you still would have to believe the Church that to be a fact, because it is the Church who produced the scripture.
I can just picture the Roman Catholics through the years standing with hands on hips, a smug grin on their faces, trotting out what they think is their ace card "the Church produced the scripture". So there!!!
Far be it from me to burst their little bubble, but I beg to differ. It was GOD who produced the Holy Scriptures, it was GOD who inspired the writers of both the OT and NT to pen the exact words he intended them to. It was GOD, no, IS GOD, who preserves his words even to this day against all the forces of evil who would cause doubt, distrust or in any way diminishment of it. It is the sole source of ALL truths he intends for us to know and is the final authority and arbiter of all doctrines "so that the servant of God may be thoroughly equipped for every good work." II Timothy 3:17
It is incidental only that the writers of the NT were, because of belief in Jesus Christ as savior, members of the UNIVERSAL church which is the spiritual body of all believers in Christ. We could ALL claim membership in that body, but we cannot claim we had anything to do with what God himself produced.
Seeing as how DNA testing wasn't around back then, what was the proof that Mary was the real mother of Jesus? If she was "intact" how could she prove that she had given birth and not just adopted the baby Jesus? Did the "Church" think that part out?