Sounds like a great idea!
Lets ask every iPhone user which they prefer:
1) You can search for, research, purchase, upgrade and get payment support for all apps in one single store with Apple as the payment processor. Every app on this store is required to tell you what data they collect about you. You can upgrade all of your apps easily in this single store.
Or
2) You can download app store apps for Facebook, Amazon, Microsoft, Steam, Epic, Google and countless Indie developers web sites in order to find, research, purchase and upgrade your apps. You will need to give each and every one of these entities your personal information including your credit card and at any given time your favorite app can change stores requiring you to then abandon the app or join yet another store. Apps offered this way will NOT be forced to provide privacy information on what data they collect on you to harvest and sell. You must visit each apps store or web site individually in order to receive updates.