they grow too large for the food supply and they are thinned by the other processes, starvation and disease, much more brutal!!!
Did the deer get to vote on this?
Humans die of starvation and disease when they outgrow the food supply. Would it be less brutal to shoot them? Maybe.
Believe it or not, I come from a family of hunters and do not have a problem with hunters who eat their kill. I do have a problem with their justifying an essentially cruel sport with the "kindness theory".