Yes, it's always a big red flag to assume that you can expect other people to do your work for you. All the ecosystems you refer to are backed by big corporate

Yes, it's always a big red flag to assume that you can expect other people to do your work for you. All the ecosystems you refer to are backed by big corporate players with massive resources and a vested interest in bringing in an audience for apps, keeping the platform alive, and in providing significant support services - particularly in regards to user acquisition and monetization. What would your company be able to do that would be comparably attractive to others?