I'd argue you have less choice if Epic wins as you as the user no longer have the choice to choose a walled garden (iOS) vs open platform (Android).

If Epic wins, you can still use the walled garden. I don't see your loss of choice.

My understanding and usage of a "walled garden" is to mean a closed ecosystem. By definition it no longer exists if Epic wins.

Continuing the analogy: Some people want a walled garden to keep their kids safe, but your suggesting to remove the walls and just advice kids to stay on the lawn instead.

By that logic I have no choice but to buy an iPhone to run many different apps because they're not available on Android.