Well, a slightly flawed analogy is that you bought a Best Buy house and the only way to get a TV is to get it through Best Buy.

It's the fact that not only are Apple providing a platform to sell the product, they're also the only distribution method for the product and are slowly clamping down on the loophole of providing a "free" app that requires a subscription bought elsewhere.

To continue the flawed analogy, the Best Buy houses are clearly the best houses in most other respects in the opinion of a lot of people and it's hard for the market to apply pressure about this one specific limitation. Whether that's fine or not is basically the philosophical argument being had.