Our actions, wants, and desires are determined by what we hold most precious. We will sacrifice one thing for another depending how they rank on our personal totem pole. I have a cousin that became a JW - which brought me to this board. His reason? He wants to believe that he will see his dad again. I don't fault him there.
Thing is, when questioned "Wouldn't you rather go to Heaven?" The answer is "no". JW's would rather stay on earth with their loved ones and pet the tigers than go to Heaven to be with the god they claim to love above all else. Yes, the correct response is "But we can't go to Heaven anyways." But do you want to? I had a JW say to me once, "Why would I want to?" How can they claim to love Him if they have no desire to see Him?