If dowsing worked it would be a very valuable skill - for ordinary
purposes such as finding water pipes etc let alone the exotic such as
finding gold, buried treasure and so on. So any dowser could earn a
bomb. In which case they would advertise their services. There aren't
any in the yellow pages. There aren't any (convincing) on the net.
Where are they? The answer is that there aren't any - it doesn't work.
However there many service industries who regularly need to search for
pipes. cables etc etc. They don't use dowsers. They would if they were
any good, but they aren't, it's a myth.
The occasional anecdote is not enough to amount to evidence. The
proof's in the pudding - those who really need them don't use them -
cos they don't exist, or if they claim to have the ability can't
demonstrate it.

cheers

Jacob