Why is a detailed biography like the 'Shri Sai Satcharita' considered essential for Parayans, as opposed to other works?

As explained in Chapter 0, performing a Parayan or Saptah requires a comprehensive and detailed work. While other poetic works, such as those by Shri Dasganu Maharaj, mention saints, these mentions are often brief, spanning only two or three pages. This makes them unsuitable for a dedicated, in-depth Parayan. The 'Shri Sai Satcharita' is specifically highlighted as a recent, sweet, inspirational, and grace-filled biography that is sufficiently detailed for this devotional practice, making it a cornerstone for devotees.