Completely agree about forcing them to do or avoid strategies, though governing bodies may disagree!
Jokes aside, it seems that despite occasional marketing/rhetoric from Apple, their platform represents the minimum bound of "openness". It's only open enough to allow further business - e.g. allowing 3rd parties to develop apps in the store (from which they take a cut of proceeds) - rather than being open for the spirit of it, if that makes any sense.
They are a business so that's not exactly something one could fault them for, though.