Maybe our brains haven't evolved far enough to utilize our capacity to do many things, as in "Physician, heal thyself."
In the last couple of days, I've read and heard in media that prayer doesn't cure patients. Well, I'm sure a number of FReepers would argue that point.
A thought ~ the technology is now so good, and the skills of the physicians so finely honed, maybe any difference in recovery prayer might provide is simply too small to measure.