Never......
LW...
You are arguing about two different types of belief system, science is just one (evidence based and testable). Religion is another and is the basis for divining (as the name should suggest).
"Biblical accounts, such as the story of Moses and his brother Aaron, described the use of physical objects such as rods to manifest God’s will (see
Exodus 7:9–12 and
Numbers 17:8). Many Christians in Joseph Smith’s day similarly regarded divining rods as instruments for revelation. They believed these rods could help them find underground water or minerals".
"The Bible addresses practices such as dowsing in
Hosea 4:12: “My people consult a wooden idol, and a diviner’s rod speaks to them. A spirit of prostitution leads them astray; they are unfaithful to their God.” The “diviner’s rod” has been variously interpreted as a magic wand, an
Asherah pole, or some type of wooden staff used to predict the future or guide seekers into “wisdom.” The occult diviner’s rod condemned in Hosea sounds similar to a dowsing rod—in fact, another name for a dowsing rod is “divining rod,” because the purpose of dowsing is to divine the location of water or precious metal. According to Hosea, the Lord places divining rods, idolatry, and prostitution in the same category. But why would God be opposed to a harmless means of discovering a water source? The bottom line is that dowsing is a form of divination, a practice strictly forbidden by God (
Deuteronomy 18:10;
2 Kings 17:17;
Leviticus 19:26). Divination is an attempt to predict the future or uncover secret knowledge through a supernatural means other than the Lord. Sorcery, divination, witchcraft, and other occult practices have been a part of human history since Old Testament days. This type of activity was one of the reasons God was so severe with the Canaanite nations and commanded His people to have nothing to do with it (
Deuteronomy 18:14;
Micah 5:12)".
So I hope you bunch of Canaanites are not too religous.
Of course then it got incorporated into witchcraft, trendy at the time, and was called "water witching" and similar names.
https://aminoapps.com/c/thewitchescircle/page/blog/dowsing-rods/NqzM_6rSMuWKkVQQ2d3NEnWM7ExarJgRbD
Then there are things like conspiracy belief systems. Take your pick - difficult to convert people between different belief systems especially since none except science are data based (well, I suppose some conspiracy theories can have valid data basis - Watergate etc.).
But it is a hobby like any other (and I know some detectorologists who have had no more success than dowsers - but plenty who have).