Yeah... I've thought about that. Intent and capacity doesn't even seem to enter into the equation.Try taking your neighbour to court for placing a curse on your car and see how far you get. Even our legal system is based on practical materialism.
I mean, if I were to try to arrange a hit on someone, I'd be guilty of a crime even if the person I tried to get to do the hit had no intention or capacity to do it.
OTOH, someone with the same murderous intent who asks a god to be their "hit man" hasn't committed a crime.
It's as if the law just takes it as a given that no reasonable person would expect prayer to have a real effect.