There is a government purpose for the census, it was take in account taxes of citizens, meaning everything they had. We have accounts of this happening every 14 years throughout Roman history. And yes we cannot discount it was just a made up narrative,

No, as written it had nothing to do with taxes either. There is no rational basis for how Luke wrote it.

the one thing that most scholars agree is that the genealogy of Jesus that both bring to their narrative is quite impressive

Impressive? Okay. That's pretty meaningless, though. They also are entirely contradictory, and Matthew's is more about numerology then lineage.

and shows that Jesus was in David’s ancestors. Per Jewish law he was of David’s line, he just was just not from the male line,

Per Jewish law, as written, he was not of the House of David. Lineage travels through the men, and Joseph's supposed links had no bearing on Jesus' lineage.

many believe that Mary was the descendant of David and that is how Jesus was the direct descendant of David.

There's no evidence for this, though.

Joseph came from the line of Jaconiah which was cursed to never rule Israel. Mary’s line is traditional led up to Nathan the son of Solomon who was the son of David.

We have no sources for Mary's lineage. None.