Because the actual resource - the deer themselves - are at the bottom of a 10 year cycle that also saw severe habitat degradation, increased disease concern, overuse from near unlimited doe hunting, and the constant hunter pressure moves deer & elk off of public ground where everyone has a fair shot at chasing them to private where they are either a nuisance for the landowner, or a problem for the rest of us.
If people really believe that hunting is conservation, then we also need to recognize that the removal or reduction in opportunity for the good of the resource is entirely worthwhile, and the correct course of action.