Let's get something clear. I know dowsing works because I have found stuff several times. I have also failed more times than I can count. But I accept I am not perfect. Map dowsing, okay I accept that some people have found stuff because I believe Dell Winders when he says he has found stuff. I have never witnessed it and my own searchings from professional map dowsers has turned up zero. Come on, maybe one in five like with the frequency generators I would be very happy. I've said Sam "Lobo" Wolfe says the typical map dowser has odds of ten-thousand to one against them.
And yes, I will say if you don't get daily feedback I have no other course than to say it's arrogant and ignorant. Every book ever written says practice, practice, practice. Basically these guys are saying they don't need practice, don't need feedback. Look, I like most of these guys. I'm here to say I know things are not right. You know what they say about changing your ways--you won't change until you get sick and tired of the way you are. But the first step is to admit to yourself that you are the problem. Many people will blame someone else--kill the messenger. If I didn't care I wouldn't say a word.