Considering the great fortune of being so close to Sai, why did Amir Shakkar eventually leave the Chavadi?

Even though staying in the Chavadi offered the rare benefit of constant companionship with Sai Baba, Amir Shakkar ultimately grew tired of the confinement. As Chapter 22 recounts, after nine months of being in one place, it began to feel like a prison to him. The narrative explains that the mind naturally desires freedom and dislikes dependency. A thought, 'Enough of this prison!', arose within Amir. This growing weariness and desire for freedom compelled him to abandon his assigned post and leave for Kopergaon, notably doing so without first getting Baba's permission.