According to James Redfield in The Celestine Prophecy, people often maintain a busy routine to distract themselves from deeper questions about life's purpose. This busy-ness helps them focus only on practical matters, preventing them from contemplating their existence and why they are truly here. This behavior acts as a shield against confronting their inner uncertainties.
Redfield suggests that by avoiding reflection on their uncertainties, individuals escape the discomfort of existential questioning. Their routines serve as a mechanism to keep these unsettling thoughts at bay, leading to a superficial engagement with life that avoids genuine self-awareness and understanding of their true purpose.