There are several traps we gun folks walk into. The one I notice most often is the protection of gun rights based upon sporting use of guns. The argument that guns don't kill, people do, is another one. And then comes this one, guns are not designed to kill.
As a hunter I peronally would not purchase a gun that was not designed to kill. Likewise for home protection or personal carry my gun better be carefully designed to kill. For deer steaks or personal protection I choose the gun for its ability to kill.
We have the right to own and use guns. There is no need to apologize for the intended purposes of the gun.