According to the faith of the Church, the divine Sonship of Jesus does not rest on Jesus having no human father, the doctrine of Jesus' divinity would not be affected if Jesus had been the product of a normal human marriage.
Hebrew Scripture contains a whole series of miraculous births, always at decisive turning points in the history of salvation; Isaac's mother Sarah, Samuel's mother, the mother of Sampson, and with all three the birth of the child who eventually contributes to Israel's salvation comes to pass as a manifestation of the gracious mercy of God. Bottom line man cannot save himself. From Isaiah, 'Sing, O barren one, who did not bear, break forth into singing and cry aloud, you who have not been in travail. for the children of the desolate one will be more than the children of her that is married, says the Lord.'
One might the question why did He reveal himself to only a small number, the disciples on whose testimony of the Resurrection we need rely? Well why only to Abraham and not the world, why only Israel and not the entire world?
Are you presuming that only you as a Jew may understand what is myth in Hebrew Scripture, that we as Christians do not understand the myths of both Testaments, even our own?