Earlier quoted context omitted.
> How does Apple control communication on an iPhone? They control what messaging apps you are allowed to install on your iPhone.
And what browser engine you're allowed to use and, thereby, the extent to which you can control your web experience. Then there's the App Store being both a point of control, a burden on developers, and highway robbery with Apple's 30% cut.
And if you think the App Store is a burden you should try implementing customer acquisition and go-to market strategies which is what the store gives you for free.