I think that many stay in the organizaton even if they know that something is wrong, because they have family and friends there. They don't want to lose these people. Also they wouldn't know where to turn to if they left. They've been told that God has one organization so they cling to that one. The bottom line is that you can't criticize the organization, even if they made mistakes, and if you do, you will be DF'd, no matter who you are.
I also read the book last month, so did my sister who never was a JW. She couldn't get over how the organization controls every aspect of you life.