Why does Chapter 8 claim that a human life focused on bodily pleasure is 'useless'?

Chapter 8 of the Shri Sai Satcharitra argues that a human life is rendered 'useless' if its sole focus is on nourishing the body and pursuing sexual pleasure. The text makes this point by drawing a comparison to animals. It states that dogs and pigs also fill their bellies and reproduce, so if a human does only that, there is no greatness in the human form. The chapter suggests that a life limited to the four basic activities of eating, sleeping, fear, and mating is equivalent to that of an animal. The core teaching here is that humans are endowed with the unique freedom and capacity to realize the Eternal, and failing to pursue this higher purpose of attaining the Supreme Self (Paramatman) is a waste of the precious opportunity of human birth.