It seems that Dixit and Madhavrao were simply lucky. Why is their journey presented as something miraculous?

The narrative in Chapter 51 deliberately frames the events as being orchestrated by Sai Baba, rather than being mere luck. The text highlights a series of 'strange coincidences' that are too perfect to be random. First, Baba's portrait appears at the exact moment Kakasaheb Dixit, who 'longed for' Baba's darshan, is present. Then, when their journey is halted by a completely full second-class train carriage, they decide to abandon their trip for the day. At that precise moment, as mentioned in chunk 14, a train guard who happens to be an acquaintance of Dixit's appears and arranges first-class seating for them. The chapter reinforces this pattern by having them unexpectedly meet Nana Saheb Chandorkar at their destination. The author presents these events as evidence of how 'the capable Sai acted to fulfill' his devotees' wishes.