animal killing for the sake of food, etc, is generally highly efficient, and usually done so humanely. of course, you can say that eventually the cow dies, the chicken dies, we have taken a life. but hey, hanging a person is immensely different from torturing him to death.
this is nothing to do with cuteness, i think you absolutely miss the point here. there is no advocation of "keep cute animals alive, but eat the cow".. it is how it is done.