Flight sim nonsense
Maybe the Capt had practiced approaches to Male, DG, and other locations because as a keen flight sim enthusiast and 15,000 HR commander who presumably often operated over the Indian Ocean he wanted to see what the approach patterns were for airfields that he might one day need to divert to?
All the airfields that people are getting excited about are listed alternates for IOR ETOPS. Chugging around Africa in a C-182 I often check out the approaches and obstacles on possible alternates even if I have no intention of landing at them. It's common sense, not conspiracy.