But it does affect me. Apple's "walled garden" approach only works if they are able to actually have walls and force companies to abide by their rules. Removing those restrictions removes any leverage Apple (and by extension consumers like me) have over other large companies. For example, Netflix could say "you have to use this other App Store" and many people would convert. It's essentially a tragedy of the commons.
Sure, it may not be fair to these large corporations, but it's currently a great situation for consumers. Everybody is free to either go more laissez-faire (Android) or more walled garden (iOS). I don't think the courts should ruin that.
Why? You have the choice of not using other App Stores. Just like you have the choice to not use Android, so therefore it doesn't effect you.