Maybe I'm looking at it wrong, but in my mind, philosophy needs to be new, or challenging or conflicting with other ideals. Zelda doesn't do that. The messages are simple, plain, and hardly debatable.
I'm glad you shared this because, as I constantly point out, knowing your definition when discussing is important.
There's a saying in the entertainment business.... I have no idea how it goes, but to paraphrase nothing is new in the entertainment business. Though the way people implement ideas make them seem original, really practically every idea has been done before. Of course, the main problem is that Zelda is not only not new, but simply cliche. This is where the definition seems to be varying. Your particular definition is kind of like art. Some people use the word "art" to mean good work.That is a real piece of art. whereas I describe anything created by a human with purpose as art. Thus, when I say philosophy, I mean anything with a meaning to life behind it, even if it is considered obvious to some, whereas according to your definition, you only find deep life meanings philosophical.
And now there is 5% less confusion in the world.