We all had the same teachings when we joined the JW's. We all studied the same books and magazines and all came to the same conclusion that this had to be God's organization. We were told how God would establish a new world where we would all be healthy and eternal. So in a way, who would want to leave the organization and not benefit from these wonderful conditions just around the corner.
So in a way, many people are staying in the organization because they think the new world is just around the corner.
Some witnesses will discover that there are injustices in the organization and that things are not like they imagined it was at first when they joined. Some will see the errors in the JW bible and magazines. Many poeple leave when they discover the lack of love and when they find out the truth about this organization.
But on the other hand, some will never leave, even if they see that things are wrong. I think that some will never leave because they don't want to give up on the promise they had from the start that the new world was just around the corner and that soon their health problems will all be gone. They still dream of having a home and health and eternity just like was taught in the beggining when they joined. No scandal will ever be big enough for some to quit because they are afraid of losing their JW's paradise.
If we try to tell these witnesses the real truth about the organization, this doesn't set them free, because we now complicate their simplistic JW world. It was so easy for them to rely on Jehovah and that he would take care of everything. Now by telling them that things aren't so, we now force them to think differently and think for themselves.
Some rather live with the illusions of a new system being close by than having to face the possibility that their religion is false.