Yes, the studies. I forgot about the studies.... The link also says: "There are, of course, also certain types of prayer whose efficacy can not be measured in the physical world"
Right. Like the kind where, in Buddhist societies, once your family member dies, and if you love them a lot, you buy them a really expensive name so they can go to a super nice heaven? If you only buy them the average name, they get an average heaven - maybe even have to be a servant.
That's true. We can't test that kind of bullshit, because we can't ask the dead people "did giving all of my money to the Buddhist temple help you out there?"
But you know what? Those practices do have testable, measurable results on this planet - we can show, for example, that the bereaved loses a certain amount of cash, that they feel some easing of conscience, perhaps, that they have a purchased status item to show off to others that only the church can provide.