Why are comprehensive biographies like the 'Shri Sai Satcharita' considered superior for Parayans compared to collections like 'Shri Bhaktalilamrut'?

As detailed in Chapter 0, the preference for comprehensive, single-saint biographies for Parayans is a matter of depth and focus. While one can perform a Parayan of collected works like Shri Bhaktalilamrut, the text points out their limitation: the biographies within them are "not comprehensive or detailed, often taking up only two or three pages." This brevity prevents the immersive study intended for a Parayan or Saptah focused on a single saint. In contrast, a detailed work like the 'Shri Sai Satcharita' provides the necessary depth and grace-filled narrative to facilitate a focused and meaningful devotional reading experience for the entire community.