That's a bad analogy. Mall owners don't take a cut of a business's revenue, they charge a fixed rent based on location and size. I'd willingly pay Apple a 50% cut if they gave me a prominent place on the front page of the App Store.
As an app developer, I'm more than happy to pay 30% for apps and in-app purchases. But for subscriptions, where Apple has little to do apart from process a credit card once every year? It's likely to stifle innovation on the platform.