It isn’t a monopoly. Which is easily understood by the fact you can buy Fortnite on PS4, Android, Xbox, Nintendo, PC, Mac etc.
People are acting like an iOS device is something it’s not. An iPhone is a product made by Apple that can run whatever it wants. It’s up to the end user if they wanted to buy it.
People aren’t entitled to run whatever they want on an iPhone just like you can’t run whatever you want on a Playstaion.
If the user doesn’t like what Apple is offering they have plenty of choice for other ways to play this game.
Hardware creators of game and media devices have always tried to control what software can be played on their systems. I’m honestly struggling to understand how many people can’tgrasp this