The whole business model of living off of App stores, controlled by tech giants, is flawed, and no sane person should ever make this their sole source of income. It's like being held hostage.
I'm going to launch another mobile app for some side income in the future but I'll never launch a real business based on that, that's for sure.
There is a good argument that the world as a whole would be better off without the current App Store model, but it makes sense for individuals to aim to profit from the existing model.