Yes, I agree that the argument is not watertight. The counterargument is, "Okay, so let there be multiple app stores on iOS, that compete with each other, and

Yes, I agree that the argument is not watertight. The counterargument is, "Okay, so let there be multiple app stores on iOS, that compete with each other, and let the market price that package of services." But regardless, let's not talk about whether Apple is providing luxuries or necessities -- that's not what rents are about.