If I am not mistaken, the OP was referring to the actual process, not the mental preparation:
"6. Chickens are food. It isn't hard to kill a chicken, pluck it, clean it, and cook it. Plus, it tastes much better than store bought."
It takes preparation, both in facilities and tools, but also mental preparation as well. Taking a life for food is one thing, killing for "fun" is another. As a youngster, we would "process" birds en mass, up to 30-50 in a day. It was a family job, and everyone had his/her assignment. (mine was usually catch, pluck and clean) It usually got put off a couple of times before jumping in and doing it, especially if a favorite old hen was involved. Never really pleasant, but a necessary part of farm life. We relied on the chickens for a large portion of our food supply, along with eggs, and usually a steer. I don't ever remember buying meat as a kid. If the chicken owner raises the chickens for the purposes of meat and eggs, and has kept that in mind the whole time, it is easier. My dad was always reminding me that the chickens, calves, sheep, ducks, etc were livestock and to not get attached to them, as it would make the whole experience harder when the inevitable time came.
Just my 2 cents.