I believe they think it is the truth because they see all the rewards few JWs see. The best JWs in the world work with them. Since everyone is on their toes when the GB comes every serious problem vanishes with minimal effort. When a GB has to wait on Jehovah they don?t have to wait long. Thirty minutes or your miracle is free. If you were a GB you would think it was the true religion. It is like if you were pope wouldn't you think Catholics are the best people on earth? Every time you come around they are happy to see you, God fearing, humble, chaste?
I think the stagnation is because the WTS is an auto indoctrinating machine lead by the GC. The RF does more edict spouting than the GB any day of the week. One string is pulled by tradition, the other by pride, the other by the legal dpt, and the rest of the new light comes from the RF writers seeing Jurassic park and print dinosaurs roamed the earth 65 billion years ago (osmosis, hence all the "bans" on entertainment and higher learning). In fact the RF are infiltrating the GB Sam Herd is a great example of this.