Many of them have been JW's for so long it would be crushing and humiliating for them to give up now.
Even though I was a JW for just a few years people would still ask me, "how can you believe in it one minute and abandon it the next".
It is a valid question if you think about it and it did come from very astute people.
I was forced to give it a lot of thought and am left wondering if anyone really buys into it 100% or whether we just go along with it because it sounds so good and gives us a 'purpose' in life.
The subconscious mind is a complicated thing, that much I do know...
The GB certainly don't believe it because they are the ones with the steering wheel and are the ones who keep changing everything.
Indeed, how could they really believe in it?