Therein lies the problem. When you're a professional debunker, you can't admit to EVEN one event being true, else you lose your credentials.
I saw this happen to James Randi, who has exposed many hoaxes. He doesn't claim to be a skeptic, rather an investigator. The one event that soured me was one in Australia, I believe, where he said he'd expose dowsing as a fraud. Dowsers who claimed they could detect water and another group who said they could dowse precious metals were tested in a field that was planted with both - water on one side and metals on the other.
The test began, and the water dowsers had something like a 70% hit ratio while the metal guys bombed at around 10%. Instead of saying that 70% was pretty good and there MAY be something to water dowsing, Randi combined the two results and said that both failed the test, "averaging only 40% hits."
That’s the Randi method! C’mon! :’)
This last summer the town of Llano, TX was out of water due to the drought. As a last ditch effort, they hired a water dowser who found water. The town was saved.