The author, a freelance designer, explains why they don't want to grow their business into an agency, preferring to work alone and maintain control over their schedule and projects. They value their independence and the ability to focus on their own creative work, rather than managing others. The author also discusses the potential drawbacks of agency work, including the pressure to constantly grow and the risk of burnout. They believe that their lifestyle business model, which prioritizes personal freedom and fulfillment, is a more sustainable and desirable approach.