I see the argument that people should be allowed to install whatever they like on their phones as very strong. However that has nothing to do with Apple's fees,

I see the argument that people should be allowed to install whatever they like on their phones as very strong. However that has nothing to do with Apple's fees, costs or value add. It might seem pedantic, but the separation of value and cost is fundamental to how everyone improves their material wellbeing and needs to be protected. And the argument that Apple is like the Mafia because they can exclude you from something would cast most businesses and all landlords as Mafia-like. That is a position some people hold, but if mafiadom is so embedded and accepted in society it undermines the idea that Apple's is a unique problem and that it will be acted on.