If you are married to a specific business model (selling applications) then yes ... maybe you are stuck on iOS. But, people are definitely making a good living

If you are married to a specific business model (selling applications) then yes ... maybe you are stuck on iOS. But, people are definitely making a good living pursuing other business models for software on the web, Android, etc. Some people even make money selling games on open platforms (Minecraft is an example off the top of my head. There are several other PC games that come to mind.)