The governing body may be very well be sincere. But remember we used to say that there were sincere people in many other religions? But that they were sincerely wrong? Because for worship to be acceptable to God we have to worship in spirit and truth?
Once you investigate the doctrines and prove them wrong to yourself. Much of the religion falls to pieces. Then if you tear down your mental "golden calves" and apply your critical thinking to the Bible you may understand how some of us go from true believers to agnostics or atheists.