Yea, and I can easily imagine in the near future you don't even have to wait for somebody to copy these simpler "app-around-an-API" apps because AI models will generate the interface and the simpler logic for you on the fly. There will be still value in the human input: the ideas of the creator / prompter about what kind of features should the AI include, but if others too have access to the same app-generating AI then they can just generate it based on the same idea. So copying simpler apps will become a lot easier and you would need some complex feature as the core value of your app to compete with AI generated apps.