It's upto individual people whether to use a locator or not. I've got a locator but my collar is fcuked, been out atleast 15 times without and had no problems. Waiting to get a new collar after Xmas. Some land can't be dug, your locator and collar would be worth £0 in these situations.
Each to their own and years ago when there was 10x more rabbits on the ground locators, collars and fancy bits of kit weren't about, they managed fine and I bet they had more bags than you get with your locator.
Seems like you've put this post up directed at certain people that don't use one, all I can s