Briefly analyse the main characteristics of totalitarian systems and your conclusion will be confirmed in entirety:
In a typical totalitarian system a few are totally cynical, many are totally fooled. There are also those who I'd call subconsciously-cynical. Imagine you have been in the truth for 30 years. You are a Bethel elder in a higly respected position. You give great public talks (from the perspective of an avg JW) and derive a lot of self-fulfillment from it. You get food and shelter for doing it. You have lots of friends and a happy family.
Then you come across something that stirs doubts in your mind. And think just how easy is it to make them go away if your subconscious cynicism starts working. You've made huge emotional investments. You realize that if you voice your doubts you may get df'd and you end up as nobody. No social security, no friends, no respect, no family, no paradise, no Armagedon. You lose your promised position of a prince in the New System. :) You also lose your natural defense system against everyday stress and frustration (The end is just around the corner so there's nothing worth worrying).
All you gain is the truth about the Truth. Not even an answer to the "What's the meaning of life" kind of questions, but rather a whole set of fundamental questions. The problem is that you have been told a million times that you already have the one and only Truth. You have been told and reassured a million times that you know more than the brightest minds of the world. So most of the time most people's subconsciousness won't even let them verbalize all those considerations. It's to scary to face it.
Two women are watching the same piece of news. It's about a notorious rapist who has just been caught and there is irrefutable evidence against him.
The first woman says: This bastard sould be jailed for life.
The second woman says: They set him up! He would never do it. I know my son better than the police or anyone else.
The thing is she doesn't. She has devoted half of her life to her son, and now it looks like it's all been wasted.