If Apple blocked fart apps of third-party developers for the sake of... I don't know what, quality or decency, then people would complain Apple are being censors.
Regarding Shoemaker, maybe Apple hired him to direct the App Store because he can run a massive online marketplace, and not because he's a talented or creative app developer.
(A little semantic aside: Apple cannot censor. Governments can, companies cannot. If we broaden the definition of censorship to include companies Apple already censors. Their system is a picture perfect example of censorship, you could use it as an example to explain censorship to school kids – but so are newspapers. This all doesn’t really matter because the word censorship doesn’t have some sort of magic properties. Something can be just as despicable as some activities described by the word censorship even if the usual definition of censorship doesn’t include it. Something can also be a perfectly reasonable activity even if the usual definition of censorship does include it.)
Regarding Shoemaker, maybe Apple hired him to direct the App Store because he can run a massive online marketplace, and not because he's a talented or creative app developer.