> If you ran a business and provided a service to your paying customers, should you be forced to offer it gratis to anyone who wants to use it? That’s an absurd position.

Yes, it is absurd. It's a great strawman.

A more realistic option would be to say that Apple has to sell access to its infrastructure via the API its own app uses, at a cost allowing some reasonable profit; this would conveniently align with other court decisions regarding anti-competitive practices by incumbent providers with strong market positions.