Earlier quoted context omitted.
It sounds like you envision a world of many different walled gardens, instead of the single Apple-policed walled garden. I can see how that would be attractive in some ways. On the other hand, parent's aren't necessarily smarter than anyone else. "Install this rando app store and get 12¢ off your next gas fill-up!"
Remember Facebook offering people a few bucks to MITM their entire phone? Oh wait, that was on the official App store! And they didn't even ban them!
No, companies can apply for their own app signing key that allows them to create apps for their own in-house-only uses that completely bypass the App Store.
Facebook used that enterprise signing key to install spyware on user's devices. This had nothing to do with the App Store, and Apple did revoke their signing key as a warning shot.
>“We designed our Enterprise Developer Program solely for the internal distribution of apps within an organization,” the spokesperson said. “Facebook has been using their membership to distribute a data-collecting app to consumers, which is a clear breach of their agreement with Apple. Any developer using their enterprise certificates to distribute apps to consumers will have their certificates revoked, which is what we did in this case to protect our users and their data.”
https://www.cnbc.com/2019/01/30/apple-says-facebook-violated...