Oh, that's entirely true. People who simply pray for illnesses or injuries to go away are being criminally negligent, and in that circumstance it can certainly be harmful. I was commenting on the fact that it satirizes mundane daily prayer, which is in itself harmless.
On an annoyance scale, it's like 1/10 for me, so don't think I'm interested in making a huge deal out of it. Just saying, "hey, prayer by itself isn't bad."
Then again, neither is religion. It's what you do with it.