Why is the study of Sai Baba's life story considered a 'straight path,' especially in the context of the Kali Yuga?

The text emphasizes that different spiritual practices were prescribed for different eras. Chapter 3 explains that what was achieved through 'meditation' in the Kruta Age, 'sacrifice' in the Treta Age, and 'worship' in the Dwapara Age can now be attained in the current Kali Age simply through "singing the Name" and service to the Guru. The author chooses "the straight path: the study of Sai’s life story" as his form of service. This implies that engaging with Baba's life and teachings is the most direct and effective means of spiritual attainment in our time, capable of burning away the sins of the age (Kalimal) just by chanting 'Sai, Sai' and prostrating once.