That truth is simply this: NOT EVERY WITNESS BELIEVES THE SAME THINGS OR TO THE SAME DEGREE
You can't completely discount that statement. I have known many witnesses that have held different belief systems and have often joked with my family (in private) about crossing things out of the watchtower. The condition however is silence. If you hold your beliefs in private then you are merely "waiting on Jehovah." Not trying to be apologetic or anything i just know many with different degrees of belief that are content to keep it to themselves. They don't try to change the org.