You could do that if Epic wanted you to be able to do that. Nothing on Android prevents it; in fact, that's how you install the Epic Game Store: you go to their

You could do that if Epic wanted you to be able to do that. Nothing on Android prevents it; in fact, that's how you install the Epic Game Store: you go to their website and download an APK. You'll have to click through some permission screens, and then you're done: the APK is installed on your phone and can be launched like any normal app, no Play store required. Epic chooses not to do that, because they want you to run their store. But Google doesn't prevent you from doing it; Epic just chooses not to allow you to.