I have witnessed, on several occasions, people going to extraordinary lengths at places like death valley to obtain photographs with no evidence of humanity in them. If you just step out onto the dunes, you can hear people cursing. How dare someone leave footprints on my dunes!
I suppose some photographers would like to give the impression, in their photographs, that they have discovered an entirely new scene. You know, walk 20 feet firm your car with a big camera and tripod and try to get an image that looks like you actually explored new terrain ...as if landscape photography were an act of claiming or owning.