The scholars have to really work at this stuff to keep the dogma about Joseph being a stepfather afloat. Meanwhile, the Messiah is the son of David. Son to son to son. Y chromosome. Tribe father, religion mother. Nobody's going to recognize because traditions void out the Word of God.
This is what happened when man couldn't see any other dynamic for a virgin birth, other than to decide that the Messiah has to be god then.
In this day and age especially, there is absolutely no excuse for that. For almost *40 years* now, man has caused conception by means of physicians and lab technicians. That does not mean those people are the babies' fathers, except for those creepy stories of malevolent fertility docs 'getting around'.
Virgin birth was a pretty common god (lower g) myth from back in the day. Several of the pagan gods were birthed of virgins. Which always struck me as odd, because most pagan worship is about really liking sex.