“the bible uses Joseph’s lineage as proof that Jesus descended from the line of David, also.”
No. the Bible gives Joseph’s lineage to show Jesus had authority to be king of Israel. Because an adopted son had full legal rights of a natureal born son.
The Lineage that demonstrates Jesus was of the Seed of David Was Mary’s given in Luke.
Jesus did not come into existance at the incarnation. The incarnation made the Word flesh (whose goings forth have been from old from everlasting).
To make Josph bilogical father of Christ removes his divinity and eternality. God the Father is Jesus’Father. And in the mysteries of the devine, it has always been so.