What makes certain Guru biographies more suitable for community Parayans than others, using the Shri Sai Satcharita as an example?

Certain biographies are more suitable for community Parayans due to their comprehensive and detailed nature. Chapter 0 explains that many biographies are not useful for this purpose because they are not comprehensive, often taking up only two or three pages. In contrast, the Shri Sai Satcharita, like the famous Guru Charitra before it, is a detailed, poetic, and grace-filled work. Studying such a detailed biography allows a community of devotees to collectively perform Guru service and helps them achieve the purpose of their lives, which is a key benefit highlighted in the text.