When we become Jehovah Witnesses, we actually were in love with the religion. We were ready to defend it, even if we knew there were some things that were wrong.
Don't we do the same with a person we love, don't we try to protect him/her even if we know they could be wrong.
The moment we started to open our eyes and saw that religion for what it really was, the love was already gone.
That's why it is so hard to go back to the hall. Even if they would come out with the right verses, we know that we wouldn't be able to have the love we had at the start.