It's not necessarily trolling, it's just an overly simplistic way to ask a complex question with complex answers. There are a few answers as to why.
Like people said, iOS is where you go if you actually want to make money on mobile apps. Apple has done a better job of encouraging people to pay for things they like... and on Android, same freedom that allows file browsers and emulators also promotes rampant piracy. I've seen a few interviews with major game developers who hate doing Android titles because they know most users will just steal the apps.
What hasn't been discussed: the tool set. It's a given that it's easier to develop for iOS due to the narrower range of hardware, but many will be quick to add that Apple's developer tool, Xcode, is superior to what you get on the Android side. Android Studio exists because the previous development method (Eclipse) was atrocious... and the consensus is that Xcode still has the edge. Want to know why seemingly every app release schedule starts with iOS, and promises an Android version later? This is why.
And as was mentioned, Google is terrible at promoting optimization for... any platform that isn't a phone, really. Tablets are the biggest problem, but just try and find the full selection of Android Wear-native apps, or those that'll work on Android TV. You can't! At best, you get a small list of hand-picked highlights that probably won't change for months. This could well help the Apple Watch steamroll Android Wear, at least in the short run; Apple has gone out of its way to support and promote smartwatch apps, while Google is seemingly ashamed of them (even launching them is a hassle).