If there's another app store or a way to install apps outside of Apple's app store, it doesn't mean you have to get the app through them. Don't feel comfortable getting an app from the developer or another app store? Then get it directly from Apple.
Clearly you don't like having options and competition.
Why would every app be on the App Store?
Epic wants to have their own application store. If you look on the Android side, hundreds if not thousands of application store exists. And not all apps are on Google's store.
Having a lot of options are not great. I want one place to do everything.