Corporate study is the core JW religious act -- part of the rationalism fetish they have. Since study is an intellectual act, it's obvious that not everyone will be at the same level; so the main thing that global corporate study cannot be is useful for, you know, learning.
Of course, back in the day, there was also this idea that they were going to share some super-kewl prophetic interpretations from time to time. Of course, conspiracy theories are something more like the opposite of intellectual activity, But that's another thread, I guess.
JWs are stupid and dishonest, so their literature must also be stupid and dishonest.