I was over-simplifying quite a bit
After publishing my essay on what I was hoping Apple would do in response to the developers community, Matt Birchler wrote a small response regarding my assertion about payments processing platform being a limited feature in the grand scheme of things. It appears I was wrong. Thanks to Matt blog post, I have a better view of what goes behind the scene here.
That being said, Apple’s payment processing service within the App Store serves Apple’s purposes and is the one that is very narrow, very focused. It’s a good thing. I’m not sure Apple has to compete against this industry. Allowing third-party payment processing services would need to focus on the minimum in order to protect privacy or help guarantee that privacy is in good hands. It’s an attainable goal.