This is just three big corporations fighting over their respective slices of the pie, if you think any of this is being said or done for your benefit I’m sure Epic has a plentiful supply of really tasty Koolaid for you. But no pie, sorry.
I never thought about it like this. It could be viewed differently because the Xbox is a game console and the iphone is a general handheld computer, but perhaps it should be illegal to restrict users installing software on your device by any means they choose, though there's no reason for you to support those means.
What you may be thinking of is that the consoles are not the main source of profit. And that the profits from consoles may take some time to make up for the expenses of developing and manufacturing those consoles.