why does the author spend an entire chapter describing the uri of Obierika's daughter?

The next day is the uri of Obeirika's daughter. It is a woman's celebration, centering on the bride-to-be and her mother. Okonkwo considers any show of feeling to be a weakness. He did not follow the Oracle immediately, but instead waited for a suitable "manly" interval. But his feelings for Ezinma are strong: despite his desire to appear manly and detached, he returns to the cave four times, gravely worried for his favorite daughter.