Why does Chapter 32 say that Guru's grace is more important than studying scriptures like the Vedas?

Chapter 32 strongly emphasizes the supremacy of a Guru's grace for attaining true knowledge. The text states that even if one has extensively studied the Vedas, Vedangas, Shrutis, and Shastras, all that effort is considered "mere chaff" without the grace of a Guru. It posits that genuine knowledge is impossible to achieve otherwise. The chapter further glorifies the power of the Guru by stating that the words from Sai Baba's own mouth have the power to destroy sins and afflictions, much like the sight of the Ganga, and ultimately cause a devotee to see their own Guru.