It has to do with how they act.
They are all super happy and in a state of ma** hypnosis. This happiness seems tempting, especially to people who are going through issues, who feel like they need something that can heal these issues.
When they see how happy the Jesus-freaks appear to be, they think that maybe, somehow, God can be the answer. Then they get caught up in the ma** hysteria too.
Problem is, this ma** hysteria is temporary, so they have to go for their weekly fix.
Theroughout the rest of the week, they are just as miserable as me and you. Their issues are still there and the causes are just concealed under a thin veneer of Godliness.
I'd rather be permanently miserable than happy and delusional for a few days and then descend into misery again. That or I can drown it in beer.