Just a short thought that I wanted to put out there. We all want to be "somebody". It's human nature. The religion gave us a chance to believe that the world revolved around our little lives -- our every thought and action was of cosmic significance in the battle between good and evil. Perhaps you know some truly die-hard Witnesses. Are they self-important over their identity as one of Jehovah's Witnesses? Would you say it is a major attribute of their personality, something that shows regularly in their behavior?
I think some JWs are unable to see TTATT simply because they cannot overcome the fear that, if the religion isn't true, they would suddenly become a nobody in the world. And so, sadly, they sacrifice their lives (usually figuratively, sometimes literally) in order to keep this feeling intact. Being a devoted JW doesn't tend to leave time for self-improvement, career advancement, saving up for retirement, etc. They've traded whatever chance they had to become someone in an uncertain world for the certainty that they matter in an imaginary world.