I don't think there is a real concern about app store economics collapsing, the app marketplace business is very lucrative. We can see this in related cases: you can avoid certain iOS taxes by purchasing your subscriptions on the web: Twitter Blue is $11 on iOS and $8 on the web. Spotify used to be $12.99 for iOS sign-ups and $9.99 on the web.
Why should users pay full bundled iOS tax that supports security updates, if they are getting none?
I don't think I've ever seen someone express the expectation that Apple's App Store fees are for the purpose of supporting iOS development and maintenance. Mostly I've seen and heard the expectation that those fees are connected to running the App Store itself (payment processing, hosting, app review, etc.) and beyond that, vague profiteering. iOS itself isn't a subscription service, and Apple seems quite happy to sell you devices even if you don't spend money in the App Store. So you seem to be stretching a bit by attributing those fees to iOS maintenance and then turning around to say that unsupported iOS versions should get a discount on the fees for any services that still work.
It means they’re shoehorning another issue into this discussion.
> seems very unethical
I agree. Clearly Apple should do the only ethical thing and immediately ban all unsupported devices from new App Store purchases.When Apple announces this (very ethical) policy change, I expect you to full-throatedly defend Apple from the mass shrieking cries of "but muh planned obsolescence!!" Right? Right?? ;-)
In fact, one could argue it's also "very unethical" for Apple to (negligently) allow someone to use a potentially unsafe or hackable product. To be maximally ethical, Apple should be remotely bricking any Apple device the day it loses security support. Better to be on the safe ("ethical") side and remote wipe too, to protect people's data privacy.
Can you see how Argument From I Merely Assert XYZ Is Unethical Then Demand Some Arbitrary Relief can quickly break down?