"Listen and Obey" is their current mantra. It creates disabled thinkers. They don't want critical thinkers because they can't back up their doctrines. Truth always holds up to scrutiny - Botchtower does not.
I told my Dad once that the human mind requires variety or else it will get sick. Constantly doing, thinking, and talking "Jehovah, Jehovah, Jehovah" causes neurological burn in. My Father now suffers from dementia. He will die because of this.