Amen! The VLOS requirement was created to assist in locating pilot by limiting the search to a much narrower radius from the drone, under the false premise of safety, prior to mandatory RID, where the pilot’s location is now precisely broadcast...
You are right on the edge of the accuracy of civilian gps which under ideal conditions is 10 to 16 ft and can be as much as 33 ft when buildings and trees come into play. This explains things. How Accurate Is GPS - September 15, 2025
Our drones...
Apparently you have not done too much exploring in the red rock country of the southwest. Many roads go through canyons, not all are the very tall and narrow slot canyons you may be envisioning. Some roads are along the bottom edges of tall...
Of course, this brings up yet again the mismatch between height above takeoff and the actual rule which regulates height over the ground below the aircraft (AGL).
Too bad DJI hasn't ever implemented some sort of AGL capable system using internet...