Suppose a woman has ten silver coins and loses one. In the same way, I tell you, there is rejoicing in the presence of the angels of God over one sinner who repents. We can then turn from our sin to God. Even when this process involves a long search, God rejoices when we are found. When a child is born, it is a joyful event.
Functional parents prize the child.
They hold the child and talk to the child and marvel over the child. The infant does not yet contribute anything to the world. It comes as a bundle of needs. But the infant brings joy simply by being. God is our Good Father.