>And yet, from the App Store’s point of view, you can build a game with guns and cartoon violence and happily ship it to kids, while tracking your own body needs a 16+ “mature themes” label.

This really isn't an Apple problem, but an American culture problem. This is such a common trope in many forms of media:

* You can sell games with gratuitous amount of gore, but implied clothed intercourse gets you pulled from stores.

* You can get away with a lot of violence and possible sneak a PG-13 rating, but a single boob gets you rated R.