"Nowadays he's convincing poor people to send them their last dollars.

These people are not just repulsive, manipulative and evil. They are also very dangerous to their victims. "

Logically I agree, but the faith healer sells hope to people who have none. There is, I presume, no coercion to give up the medicine, just a blind unreasonable belief in the possibility of a cure when all else has failed. It is obviously morally deeply wrong to do this to such desperate people, but it is their choice how to spend their money, and their need for reassurance could outstrip their common sense...but who knows, perhaps at least some of the hope thus gained cheers them.