These people sell snake oil. They know exactly how to play to the frailties of their audience. There are a lot of people in the world who need a considerable amount of order, structure, and continuity. They also need to feel empowered in a world where they are just cogs in one giant wheel. The preachers know exactly how to cut, paste, and shoehorn the message to fit all those needs.
"Friends, feel like your life is counting for nothing, and everything is out of control? Then become a soldier in God's army in his war with the evil one"?