Why is Shirdi considered so important for Sai's devotees?

According to Chapter 27, Shirdi holds the most sacred place in the hearts of Sai's devotees, surpassing countless other holy sites and pilgrimages. It is described as a place of great fortune, and the opportunity to be there is considered a result of good fate. The profound significance of Shirdi lies in the fact that it is the place where Sai Baba guides those who have surrendered to him, showing them the true and beneficial path to accomplish their life's purpose. For his followers, this union with their Guru in Shirdi is their greatest luck.