> Why is it fair for apple to arbitrarily prevent the installation of any competing distribution methods?

Same reason it is fair for Nintendo to not allow Sony to sell Switch games, and Sony not to allow Nintendo to sell PlayStation games.

Their circus, their monkeys.

> Apple has said "Nice store you've spent all that money building, such a shame we've decided we won't allow you to use it on an iPhone."

Epic also can't put the Epic Store on Switch or PlayStation. Strange how there's no hand-wringing about that.