Perhaps (5) Still, we don’t take for granted that Mary did not have other children just so, we believe the witness of the Church.
However, I don’t argue over words. Whatever it is you think we are doing, it is a belief based on our belief in the historical witness of the Church, the same belief that we have in the scripture as a historical document produced by the Church.
The Jews of Jesus day made claims of having long standing tradition and eminent forefathers too. It was of no value whatsoever in 70 C.E. Jesus had earlier said their ‘house was abandoned to them’ and all the claims went up in smoke.
Beginning in his own time Jesus gave the illustration of the wheat and darnel.
So which one were the “fathers” of the Catholic Church? Remember Jesus the wheat and darnel were indistinguishable and would remain so until the harvest when the crop became ripe.
As Paul said, even in his day some were teaching false doctrine and attempting to assume a position of ruling over the congregations like “kings”.
While the apostles were alive they could exercise a restraint but when the last of them died and the Bible canon closed then weeds would grow along with wheat.
So what is “the historical witness” of the Catholic Church?
Apocrypha? Debates over Greek philosophy? A wheat/weed field under a murderer like Constantine?