The problem is that "my" device is not allowed have non-Apple App Store. If Apple allowed others to create App Stores, then there would be no problem, but hard

The problem is that "my" device is not allowed have non-Apple App Store. If Apple allowed others to create App Stores, then there would be no problem, but hardware + iOS + App Store are inseparable. It's like U.S. citizenship forbidding non-Walmart shopping.