This would be dia pneumatos agiou
You said:
The line "from/of the holy spirit" is placed in the genitive with the preposition ek. The sense of the genitive phrase here can't really be interpeted as anyway other than originating from.
The originator/cause/the which begat/etc.
which would be dative and not use ek. From the BDAG "in expressions which have to do with begetting and birth from, of, by: ek introduces the role of the male." In other words, the line literally takes the holy spirit to be the father of Jesus.
from, of, by: ek
the line simply takes the holy spirit as the "cause of existence" of the fetus, it was from, it was of. it was by, the holy ghost...it does not necessarily mean that the Holy Spirit sired Mary.
(e.g. Matt 1:18), it states just as clearly that Jesus had no biological father and was descended from the holy spirit.
Matthew 1:18 Now the birth of Jesus Christ was on this wise: When as his mother Mary was espoused to Joseph, before they came together, she was found with child of the Holy Ghost.
The verse only says that Mary got pregnant before she even had sex with Joseph, the child was
from, of, by the Holy Ghost, it did not say Jesus had no biological father and it did not say that the Holy ghost was Jesus' biological father.
It was written that Jesus was made of the seed of David according to the flesh (Rom 1:3) , prophecy says that the messiah would descend from David, from the tribe of Judah (micah 5:2).
Therefore, indeed Jesus was made of the seed of David according to the flesh, through Joseph, the prophecy was fulfilled in Jesus that the messiah would descend from David, from the tribe of Judah because Joseph is son of David according to scripture.
Joseph was not supposed to and did not have to have to have sex with Mary (this was done so that the prophecy would be fulfilled in Jesus, that he should be born of a virgin). God, through the Holy Spirit prepared the body (heb 10:5) of Jesus (the holy seed), from Joseph and then implanted it to Mary's womb. Both prophecies were then fulfilled in Jesus regarding the Messiah, that he would be from the fruit of the body of David (through Joseph), to be born of a virgin (through Mary).
Like I said,
God can make Mary be impregnated with Joseph's seed even without sex. And yes, it had to be from Joseph's for the prophecy to be fulfilled, and it was.
If God was able to make Sarah who was already old and menopaused conceive Abraham's seed and Elisabeth who was barren conceive Zachariah's seed, how can he not do the same to Joseph and Mary especially if that is how the prophecies about the messiah would be fulfilled?
Ps 94:10...
he that teaches man knowledge, shall not he know?
Luke 1:37
For with God nothing shall be impossible.
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In Luke 24:44 Jesus said, many things concerning him are in the writings of Moses, the prophets and in psalms of David , this particularly caught my interest, i believe it affirms my thoughts:
Genesis 22-24
Joseph is a fruitful bough, even a fruitful bough by a well; whose branches run over the wall:
The archers have sorely grieved him, and shot at him, and hated him:
But his bow abode in strength, and the arms of his hands were made strong by the hands of the mighty God of Jacob;
(from thence is the shepherd, the stone of Israel: )