On top of that, Netflix has already set the precedent for interactive video controlled from iOS devices.
What is Apple's argument for allowing the choose-your-own-adventure Netflix titles (without per-title review) but disallowing more fine-grained interactivity?
That's not the case. It literally is sending user input to the server, where the game is running, and then you watch a video back. That's the base technology that underlies every single gaming streaming service (to date, at least).
What is Apple's argument for allowing the choose-your-own-adventure Netflix titles (without per-title review) but disallowing more fine-grained interactivity?