Why was Sai Baba indifferent to the 'So-ham' or 'I am He' attitude, as mentioned in Chapter 36?

Chapter 36 of the Shri Sai Satcharitra states that Sai Baba is "indifferent to the 'I am He' (So-ham) attitude" and that "he delights in the service of those liberated in Brahman." The provided text does not explain the philosophical reasoning behind his indifference. Instead, it presents this as a characteristic of his divine nature, immediately contrasting it with his love for service. This passage from Chapter 36 portrays him as a being who, despite his supreme state, finds joy in serving others, positioning him as the "swan in the lake of the Supreme" whose greatness is incomparable. The text focuses on describing his qualities rather than providing a detailed explanation for his specific spiritual dispositions.