What if it’s not working any better than blind luck but the water companies are using it anyway? What if it’s actually a form of fraud disguised by the woo woo

What if it’s not working any better than blind luck but the water companies are using it anyway? What if it’s actually a form of fraud disguised by the woo woo effect of saying it’s dowsing? If I were a shareholder in one of these water companies I’d want some answers and some concrete stats.