The Watchtower Study is not real Bible study. It is a study to introduce WTBTS beliefs,doctrines, and practices. Just think for a moment! If you just read Bible scriptures alone, the Watchtower Society could never introduce this gem from the Watchtower 1981 Dec 1 p.27. This magazine is studied weekly by millions of Jehovah's Witnesses all over the world. It is read and and discussed as if it really comes from the Bible. The Watchtower Study is a another manner for the Governing Body to replace Jesus and introduce any rule, regulation, policy, belief, doctrine, practice it wants. It is used only to ingrain it into everyone's brain.
"But Jehovah God has also provided his visible organization, his "faithful and discreet slave", made up of spirit-anointed ones, to help Christians in all nations to understand and apply properly the Bible in their lives. Unless we are in touch with this channel of communication that God is using, we will not progress along the road to life, no matter how much Bible reading we do." Watchtower 1981 Dec 1 p.27