Mental manipulation and coercion is the game the leaders of the JWS play onto people, why ? because if they do that they gain new supportive adherents and sustain the ones they got (increase in numbers) which whom will inevitable bring money, glory and power to the men at top. Men who want power have always looked to god for that power, selling themselves upon that premise lures people toward them who usually bring them material wealth and control.
Religion has always been an act of mental exploitation and manipulation.