Maybe someone already posted this...
In the US you can't just go shoot any deer, anywhere. You can only hunt specific breeds of deer where culling is needed to protect the ecosystem, and you can only take the males.
You buy a license, which is not cheap, and you get a tag. If that tag doesn't match the deer you take, you pay a heavy fine and lose your hunting privilege for a few years.
For decades now, deer hunting is sanctioned by Fish & Game as a means to cull areas of deer overpopulation. An over-population of deer will wipe out vegetation that supports other wildlife, such as certain birds that control the rodent population and spread plant seeds....and so on.