More stores might be more choice for you, but it would take away the benefits to me of apps having to go through Apple App Store review to get on my phone.
Finally, the thing is users don’t always want all these choices. Really. That’s why the Play Store dominates on Android. Consolidation and simplicity benefits users. I know that creates monopoly issues and Apple should be held accountable, but the concerns of users like me need to be addressed. A Freedom Store with loose controls on iOS, but with Google apps, Facebook, Spotify, Fortnite, probably all the MS apps as well, all as exclusives would coerce users into using two different stores and cripple privacy accountability for iOS users like me.