Why does the narrator interrupt the main story to tell the origin of the name 'Hemadpant'?

The narrator pauses the main storyline to explain the origin of the name 'Hemadpant' for several interconnected reasons, as detailed in Chapter 2. Firstly, he explicitly states in chunk 15 that he is fulfilling a promise made to the listeners in the previous chapter. Secondly, he acknowledges that the name appears at the end of every chapter, which would naturally make readers curious about its origin. As mentioned in chunk 16, he wants to satisfy that curiosity. Thematically, the story is introduced right after a discussion on avoiding argumentation, because the author's description of his past self as cynical and argumentative provides a perfect real-world example of the very personality type Baba warns against, making the story of his transformation and renaming particularly relevant.