What he's advocating for the app store may be a good thing, but it's certainly insane to call it freedom. Freedom is when you can do whatever you want. When you restrict stuff, for better or worse, that's less freedom. Taking away all meaning from the word "freedom" is a really bad idea.
There is simply no such thing as freedom from the option to watch porn if one wants to watch it. That's like freedom from truancy, or freedom from marijuana, or freedom from leaving your jail cell, enforced by the police. Some will argue those are good things, but none should argue those are freedoms.