Why is a detailed biography like the Shri Sai Satcharita considered important for devotees, as opposed to shorter works?

The preface explains that while shorter works on saints exist, such as those by Shri Dasganu Maharaj, they are often not comprehensive or detailed enough for an in-depth Parayan or Saptah of a single saint's life. According to Chapter 0, a detailed, poetic, and comprehensive work like the Shri Sai Satcharita is considered more suitable for this purpose. By studying such a detailed biography, devotees can perform a more meaningful Guru service. The text highlights that this specific biography, along with the Guru Charitra, are rare examples of such thorough works, making them invaluable for deep study and community practice.