I could say the same about every Christian church, every American politician, and frankly most US corporations.
If the question is how doss it survive when it is obviously bullshit, you'll have to ask that of Christianity too, as well as non-Christian bullshit like Scientology and homeopathy.
All you have to do is follow the money trail. Like the character Satan says in the temple movies: " You can buy anything in this world for money". There are always going to be the duped, or the vulnerable who have been taught that if you pay up to the organization, you will be safe. I let my fire insurance" policy run out some time ago.