Regardless of whether you have the responsibility to make that choice or not, you are still responsible for dealing with the consequences of whatever choice has been made for you.
How is that any better that being responsible for making the choice in the first place?
Suppose Facebook decided to move to a different third party store on iOS, maybe their own store, so they don’t have to list their data access and sharing policies, don’t have to go through app store review, etc.
Doing that forces me to choose between rigorous app review and disclosure, and using the Facebook app. I don’t want to be put in that position. One of the reasons I use an iPhone is because of that.