Except in the comparison water = contact lens, and I am happy to believe Alan's contact lens is real. Absolutely if there is something to be shown then you do the studies, but those studies show there isn't. There are millions of people who think homeopathy is great but you wouldn't think that the number was useful in saying anything.
Except nine out of eleven water companies think that it gets results. I want to know why they think this given, as Rhiannon has noted, they're unlikely to continue to pay somebody to do it if it's as hopeless as you make out. (Though I wouldn't imagine the financial burden of paying a dowser is particularly onerous).
Homeopathy unquestionably "works" in the sense that while there's zero evidence that it cures the underlying condition, some people find that they feel better psychologically after it than they did before on the basis of the placebo effect/suggestibility.
Failing to cure an underlying condition is my definition of "not working." Making somebody feel better, if only a little, is working of another sort, though.
Absolutely if there is something to be shown then you do the studies
This seems haywain prior to the equine. In this case it looks as though there's something to be shown: 9 out of 11 water companies - big businesses - think that there's something about this practice that works regardless of what the studies say.