That's not a sensible reply, IMO. Look, Apple designed a smartphone that's become an industry standard (to the point where the once dominant Blackberry phone is all but killed off, and your options for a cellphone realistically come down to "Android or Apple?"). The phone wouldn't be NEARLY as popular or useful as it is, if it wasn't for Apple allowing 3rd. parties to code apps that run on it.
The "App Store" is valuable to users (not just to Apple themselves) as long as what's posted up there has been reviewed and ensured safe and spyware/virus free. But when Apple started leveraging the "single point of software distribution" as a way to kill off anything it sees as too much competition, something is wrong.
People keep comparing this to owning a retail store and expecting them to let you put your stuff on their shelves, whether they like it or not. But that's not what's being proposed here! The terms of what Apple supposedly allows and doesn't allow are already published up-front. (We know, for example, the App Store will not sell any porn.)
This is about developers who offer apps that iPhone users want, and which would appear to be perfectly allowable in the App Store. Yet they get banned simply because Apple won't let them do any paid subscription things that it doesn't get a direct cut from. Even Microsoft, as huge as they are, had this fight with Apple when trying to offer iOS versions of Office 365 apps.
I think a more reasonable approach by Apple would be allowing "outside subscriptions" that can take place via the apps themselves, but maybe qualifying that with a few rules. EG. Require that "Apple Pay" be accepted as a form of payment for those subscription purchases. Or maybe even design things so developers wishing to do this have to pay a higher annual fee to get a developer's license that allows uploading that type of content?