Except, that's not what the article is talking about. It was not the person praying that had their activity shut down, but the person hearing prayers. And not prayers in general, but only when coming from someone they perceived to be a "healer", but not prayers by an "ordinary" Christian.
Right.. I don't really like the wording of the statement. But the article makes sense though. If already believe in someone, your "doubt" mental processes shouldn't be firing.