IMHO as a user I prefer purchasing via app store because it avoids all of the dark patterns companies use to prevent subscriptions or returns.

I get that it sucks that the honest folks have to pay a 30% fees

I'd be happy to pay a 30% premium on my app store purchases just for the ability to unsubscribe without dark patterns.

I like the fact that when deleting an app, it reminds you about existing subscriptions related to that app, and offers to take you to the subscriptions page to unsubscribe.

In saying that, I don't think I'm personally prepared to pay an additional 30% for that. It should just be what is expected as part of good business practice.