Why does Katherine from Catherine called birdy think that Perkins is the luckiest person?

In "Catherine, Called Birdy," Katherine believes that Perkins is the luckiest person because he has the freedom to choose his own path and live life on his own terms. Unlike her, who is constrained by societal expectations and the pressures of an impending marriage, Perkins enjoys independence as a servant. This contrast highlights her longing for autonomy and the ability to shape her own destiny, making her envious of his seemingly carefree existence.