How does the story surrounding sacrifice in the temple when Jesus is a baby fits with Luke's theology?

A:Luke 2:24 tells of Joseph and Mary offering a sacrifice in the temple, for the birth of Jesus: "And to offer a sacrifice according to that which is said in the law of the Lord, A pair of turtledoves, or two young pigeons."

Much of the theology in Luke was concerned with the poor, with even its beatitudes differing from those of Matthew by their emphasis on the poor. Now, Jews were expected to sacrifice a lamb in thanks for the birth of a boy unless they were very poor, in which case they offered a pair of pigeons as a sacrifice. Luke is emphasising that Jesus came from a poor background.