Why are the works of poets like Mahipati and Dasganu Maharaj described as unsuitable for a devotional reading (Parayan) of a single saint's life?

The works of Shri Mahipati Maharaj and Shri Dasganu Maharaj, such as 'Shri Bhaktalilamrut' and 'Shri Santalilamrut', are compilations containing biographies of numerous saints. While one can perform a Parayan of these works in their entirety, Chapter 0 highlights a specific limitation. If a devotee wishes to perform a Parayan focused exclusively on the life of a single saint, these books are not ideal. The reason given is that the individual biographies within are not comprehensive or detailed, often spanning only two or three pages, which is insufficient for an in-depth devotional study of one person's life.