You're thinking about it wrong. It's not 1 app on iOS for every 1.5 apps on Android. For any given app in a competitive space, there are probably twenty choices

You're thinking about it wrong. It's not 1 app on iOS for every 1.5 apps on Android. For any given app in a competitive space, there are probably twenty choices on iOS and thirty choices on Android. It's fair to say that three choices is better than two, but every additional choice will have diminishing returns. And at some point, the chances of an additional choice having any novel appraoach or distinctive features approaches zero.