Why did Sai Baba become so enraged when a devotee criticized Mavshibai's forceful massage technique?

According to the account in Chapter 24, a great devotee saw the intensity of Mavshibai's service and became worried, telling her to have mercy and be more compassionate, lest she break Baba's veins. As soon as these words were spoken, Baba's demeanor changed drastically. He quickly rose, grabbed his Satka (short stick), and struck the ground. The text describes him entering a "terrible rage" with eyes "glowing like charcoal embers." While the exact reason is not explicitly stated, Baba's reaction strongly suggests he was angered by the devotee's interference and failure to understand the nature of the service. Mavshibai's actions stemmed from pure, guileless love, and the devotee's criticism judged this act of devotion from a superficial, physical perspective, which displeased Baba immensely.