The quote explores the theme of disillusionment experienced by individuals who conform to societal expectations, often leading to a life that lacks fulfillment. People like Dan, who live within the confines of mortgages and family obligations, may feel trapped and disappointed by their choices. Despite their outward success, they might not recognize their dissatisfaction, illustrating a disconnect between their true desires and reality.

This idea reflects a broader critique of modern life's demands, where responsibilities can stifle personal dreams. The concept of "high-functioning sleepwalkers" paints a poignant picture of those who mechanically navigate their lives, unaware of their discontent. It raises important questions about the nature of happiness and the sacrifices made in the pursuit of stability.