Why is a detailed, comprehensive biography like the Shri Sai Satcharita considered essential for community practice, compared to other writings?

Chapter 0 explains that while some writings on saints exist, such as those by Shri Dasganu Maharaj, they are often not comprehensive enough for dedicated devotional readings like a Parayan or Saptah, sometimes spanning only two or three pages. A detailed poetic biography, however, allows for deep immersion and study. The 'Shri Sai Satcharita' is presented as a prime example of a work suited for this purpose. Performing Parayans of such a detailed work is a form of Guru service and public service, enabling a congregation to study together and collectively achieve the purpose of their lives, which is the foundation of community practice.