The market is not competitive enough to actually be able to vote with my feet/dollars. Options are give up control (choose Apple) or give up privacy (choose Google). That is not a choice consumers should be forced to make.
Yeah 100% the other stores will not allow for private APIs and circumvent privacy protections and anti-tracking mechanisms. I would 100% believe Facebook on the App Store vs Facebook on the Meta store will be the same…
That said, there's not a whole lot an app can do to track you (without requesting special permission) that a random website you visit couldn't.
Besides immoral, obviously tons of apps would leave the App Store for a different store making it a much crappier experience for folks that use those very popular apps.
If you don't use Facebook, then it shouldn't matter if they move to a Sketchy App Store.