How does Liberty 5-3000 lack individuality?

She is one of the Peasants who till the land outside of the city, but unlike the other women she is tall, beautiful, and proud. She and Equality 7-2521 admit their love for each other, and when he runs away into the Uncharted Forest, she follows him. Although she follows Equality 7-2521, she lacks his individual drive and unique world view.