I’m not sure why Patreon couldn’t replace the “subscribe” button with a “wishlist” button within the iOS app. They could add a link that opens your wishlist in the browser too. It turns what should be 1 click into 3, but it seems far more sensible than accepting the 30% fee.
And if it is true that they're not allowed to disable payments, I would also love to know what's special about Amazon, Netflix, and Spotify (other than their size) that would allow them to "get away" with the same behavior.
I subscribe to a bunch of Patreons, and most of them are videos (which I can view on a website) or they're downloadable assets I use my PC for accessing anyways, wouldn't make sense on mobile no matter app or website.
Hell, Jobs originally wanted there to be no iPhone SDK, and for everyone to create webapps. Man, that would have been a better world. Initially it would have sucked, but the mobile web platform would have improved so much faster, and APIs for doing native-y things would have been complete and useful 15 years ago.
Perhaps, if only the segment of the population forced to use a browser that didn't support PWAs for over a decade. I can see why they would forget about websites over a long enough period of time.