The cruel and merciless Sword of Shunning held over the heads of the rank and file JW is what gives the org. it's membership stability.
The blind loyalty of a single person - a mother, father, husband, wife, or grandparent etc. can keep 2, 3, 4 10, ? possible doubters holding their tongue out of fear that their lives will be turned upside down by shunning. It works.
This is an organization held together by fear, not love.