I suspect it's the last one that bothers you the most. However, keep in mind that Google has a monopoly on Android app delivery. (Yes, we will ignore the alternatives because they are not reasonably accessible to most users.)

Since Google has a monopoly here, any app that pleases some users strengthens the platform, leading to more users which leads to more apps, some of which generate revenue for Google. If there were a reasonable competitor app store for Android, this developer could drop Google and go give his app away for free on the other app store. THAT would deprive Google of more revenue because it would strengthen the competing delivery platform.

The only "entitled" party here is Google, because they believe they are entitled to a cut of all money possibly made anywhere from any app that runs on their "open source" platform - simply because they are the gatekeeper.

I am sorry this came up sounding entitled: I don't expect Google policies to change on this subject, and since this is not business threatening to me I just decided to write something I thought would be snarky and hopefully amusing to read.