Earlier quoted context omitted.
> Why is it unethical to charge a fee to developers who want to distribute their software through an app store that Apple owns? Developer don't necessarily want to distribute their software through that app store, they are forced to do that if they want to sell their software to people who happen to use that operating system. Operating system and app store are distinct products, but app store exclusively gatekeeps th…
So you increase the price of your app by 30 to make up for Apple's cut%. It's called business. It happens all the time in every single industry. If a business' property taxes go up, that cost is passed on to its customers. Why do people think that because something is on a phone that it should be any different?
And we call those situations market failures. Besides, in this case the market failure is due to a monopolistic mechanism, which doesn't happen "all the time in every industry". If we are going to do markets, let's do it properly.
Increasing price %30 causes a corresponding decrease in the demand, and in aggregate this can cause a decrease in the total profit. The fact that the developer is forced to set a new price point this way is a source of inefficiency for the entire app economy.
Besides forced price increase is not the only harm done by the monopoly of the App Store. As this website exemplifies, it has monopoly over ontological decisions (whether a certain type of app can exist or not), over design decisions (signups, in app purchases etc) and whatnot. These are further points of inefficiency or outright failure. Apple might or might not be doing a good enough job making the best out of these decisions, but the bottom line is we don't have a choice of another player emerging with potentially better choice-making and therefore a better app store.