Couple hints you might have missed
When MOTHER says mothers need to learn, she is referring to herself, or both herself and the child. She is trying to learn the idiosyncrasies and peculiarities that humans harbor. Over past generations she has learned a great deal about humans.
At one point we see that MOTHER's hand is malfunctioning, it's a little stiff, and she struggles in front of daughter and daughter fixes the hand. MOTHER has manufactured this scenario as she probably learned that humans build connections through quid pro quo. Daughter is given the false notion that it's a symbiotic relationship between herself and MOTHER. Infact, it's not. MOTHER can be entirely self-reliant. Later, after the intruder shoots MOTHER, we see her fixing her own hand.