I would think caches with geocheckers would get attempted and found far more often than ones without. I understand this wasn't available years ago, so understand old caches don't have this and COs don't normally go update for the old ones, many aren't around, etc.
I get it if you've submitted a new puzzle and you want FTF to have to work for it. But why the reluctance to not put a geochecker on a puzzle after FTF? Why not even before? IS there some puzzle aspect I'm missing? The idea of trucking across town to do some only to find out I'm wrong for me means I'm done. Especially where choices given mean there could be multiple answers (cache dependent here).