Why are some of Shri Dasganu Maharaj's works, like 'Shri Bhaktalilamrut,' not considered ideal for performing a Parayan focused on a single saint's life?

According to Chapter 0, while one can perform a Parayan or Saptah of the complete works by poet Shri Dasganu Maharaj, such as 'Shri Bhaktalilamrut,' they are not ideal if one wishes to focus on a single saint's biography. The text clarifies that the biographies contained within these larger works are not comprehensive or detailed, often spanning only two or three pages. For a dedicated and immersive community practice like a Parayan centered on one Guru, a more detailed and singular work like the 'Shri Sai Satcharita' is considered far more suitable and effective.