I guess you are right, they are explicit about demanding that people do what they say. But they do seem to believe they are doing it for the ‘right reasons’, as such. In other words, I don’t think they are using religion as some sort of ‘cover’ for their wish to control people. They genuinely do believe what they teach and therefore believe it is for the best if people do as they say. There may be a few Watchtower leaders who don’t believe it or are entirely cynical power maniacs, but I think most are genuine.
People who object to the level of control the GB exercises who also believe in the Bible would have to grapple with the fact that the GB can point to many good examples in the Bible as the basis for their style of authority. (Moses and Korah, Jesus telling his followers to forsake all else and follow him, Ananias and Sapphira in Acts, Paul in his letters, and so on)