Can you not see through the PR tosh they are spouting in the film?
Everything is about them, them, them.
They (keepers) never admit that what they do to wildlife is in any way wrong.
They (keepers) firmly believe that everything they do is conservation based.
They (keepers) cause the excess of Mountain Hares, and I'm sure they all enjoy a day or two out on the moor shooting the hell out of those animals.
It's a sad way of using the upland environments, messing about with nature like it's their right.