Why is devotion to a manifest (Saguna) Guru, like Sai Baba, emphasized so strongly in Chapter 11 of the Sai Satcharitra?

Chapter 11 strongly emphasizes devotion to a manifest (Saguna) Guru because it is presented as the most accessible path for a devotee. The text argues that as long as a worshipper has a physical form, the Guru must also be in a physical form. This allows for tangible acts of worship and love, such as being able to place one's head at the Guru's feet and exchange words of love. According to the chapter, understanding the Saguna is much easier than the Nirguna, and it is through meditating on this manifest form that loving devotion occurs. This devotion is the key that opens the bud of the mind, which is a necessary step before one can realize the formless, or Nirguna.