Lee Marsh
There are couple or a few huge factors going on here.
The GB assumes total control over all JWs. JWs don't vote them into office. They take it and keep it.
It even tries to have control over those who have left.
The use the God-card and the death card to maximize effect. Fear of both is pretty powerful stuff. For people who do believe in a higher power of some sort, the need to believe in a God that protects them is an ace-up-the-sleeve for many people
The org acts like a totalitarian government. They maintain complete control over its members lives, censor anyone that doubts, even encouraging its members to turn in anyone they suspect may have doubts. If a member turns in another, they may feel some discomfort in doing so but overall they feel they have done the right thing. With that in mind, the members are complicit.
In any totalitarian regime, there are plenty of people that flourish within it and enjoy the prestige, status or power it gives them. While there are not experiencing any personal difficulties, why change anything?
Those of us that are out can see it for what it is, but as all of us know, losing friends/ family isnt easy, parrticularly if you are born into it. The fear of losing your social structure now and your eternal life later are 2 strong motivators to smile and pretend everything is ok for a lot of JW's.