Using Location Services on macos Without Wifi
Let's say your desktop machine has been sitting in place for 7 years without moving. Apple refuses to let your machine know its location without Wifi active. But you are using your glorious ethernet connection and don't want the chaos of a secondary connection that will sometimes get used and throw everything into a tizzy.
It is possible to work around this. Your Wifi radio has to be on and watching beacons, but it doesn't have to be connected to a network. Go through any network you know how to join and turn off "Auto join". Cycle your wifi off and back on. If you connect to a network, go set that one to not "Auto join" as well.
Once you have no networks to auto join your Wifi rainbow in the menu bar will be grayed, but your location services still work because the radio is looking at beacon messages from the nearby access points.
Maybe someday Apple will give us "On/Off/Location Only" for our Wifi state, but until then, this works. You just have to manually ask to join your network when lightning strikes your ethernet switch.