People don't like change. They are in their comfort zone and don't want to leave. And some have a vested interest in maintaining the lie.
Their work life and all their friends can be tied up with the deception of the watchtower.
So they live their life in denial.
I think some must also believe. They do not entertain information that disproves their position.
They are closed minded.
They feel if they were to peek behind the curtain, their house of cards would fall down and they
would not know how to cope with life.
They need the structure of the organization. They need the unnecessary business of being a witness
to give their life meaning.