Earlier quoted context omitted.
Under Apple's clarified guidelines, if a University put out a remote learning app to help students deal with the pandemic better than a browser solution, Apple would be entitled to 30% of each user's tuition. Once they have a few slow quarters and pull the lever on taking a cut of app mediated real-world services, we may see 10-30% of each Taxi ride going to Apple.
Apple only extracts that revenue from apps if you want to directly take payment through the app. Both Netflix and Spotify work on iOS. They just are not collecting payments or doing new signups there. So in your analogy the student is presumably registered already with the school and Apple doesn’t take a cut at all, even today.
Even if you take payment through your app that you built with your own payment processor.
Why is Apple standing between me and my school again? They made a profit off of the hardware that I purchased from them and now they’re just standing there stopping me from paying for what I want on the device that I bought.