It's a corollary to Apple's mantra "The best way to make software to make your own hardware". Apple believes in total end-to-end control over the experience. Y

It's a corollary to Apple's mantra "The best way to make software to make your own hardware". Apple believes in total end-to-end control over the experience. Yes to a certain extent they are motivated by money, but they are far more motivated by maintaining control. Allowing users to install third party software via another route means that Apple is no longer in control. Apple wants to be the singular provider of everything on their platform. You can see this in action on macOS. Apple makes almost no money from macOS, yet their grip over it is ever tightening.