What if the Witnesses are correct?
What if Osama bin Laden is correct?
What if angels danced on pin heads?
You can't go through life wondering what if. You make the best decisions you can in life and then let it go. If you're wrong, you learn from the mistake. If you're right, you grow from the experience.
If Jehovah's Witnesses are correct, then we are all going to die in an Armageddon in the near future. I would rather be destroyed than living in the world they paint and worshipping their god.