I'd argue the purpose of almost any handgun is to be fired at a human, any target practice is just preparation in case that happens.
There have only ever been two nuclear bombs dropped in anger in human history, does that mean the purpose of a nuke is to be carried around on a submarine or sit in a warehouse somewhere?
Most calibers in use today were designed for military use, and their primary purpose was to be fired at a human. It just turns out they work well on animals too.
There's only a few that were designed for use on animals, most as a pest control round.
Some of the nuttier members of the ML communities are definitely saying it.