If your teeth are like mine, then they are sharp at the front, designed for the cutting and tearing of flesh.
Industrial farming is about as humane as any other method for killing I've seen/practiced.
People argue that hunting keeps one more connected with the concept of meat as quarry, but the end result is the same. I shot a scimitar oryx through the heart a few years ago (before the ban) and it still ran 100 yards before it dropped. I'm pretty sure stun guns and captive bolt pistols remove the concept of pain faster.