Utilitarianism fails to acknowledge the concept of adaptive preferences, where individuals settle for less due to lack of exposure to alternatives, reinforcing unjust norms. Utilitarianism also disregards the desire for active agency in life, as highlighted by the idea of a satisfaction machine. Most people prefer to strive and act as agents in their lives rather than passively receive satisfaction. This focus on agency leads to the rejection of utilitarianism in favor of a different approach.