Apple is held accountable by people choosing not to use their device. If iPhone is too expensive for the value it provides people won't use them.

>The thing with this 30% tax the private company Apple imposes on a majority of US adults is reasonable?

By this logic grocery stores have been applying a 30+% tax to all of America since the country was founded.

>but not allowing other stores OR allowing external payment methods to be advertised is definitely predatory behavior

Again comparing to a grocery store I think it is fair for them to prohibit unauthorized sellers to sell within their premises. This is a standard because it can undermine the business model of the business.

>But Apple makes a profit of iPhones, they make a profit on iCloud, they make profit on App Store... They make a profit everywhere.

And that's why Apple is worth 3 trillion and Sony isn't. Apple has created a successful business with large profit margins that people are willing to pay. It's not predatory if people are willing to pay for it.