While I can respect that is how you feel I don't think we can categorically state as a fact that they are not pets, to some, they clearly are. No matter their fragility or life expectancy or how some use them. After all some people eat cats, alligators, and zebra. While Chickens are livestock, they doesn't mean they can't be pets. Just because some horses are race horses doesn't mean they can't be pets. My chickens ARE pets, no matter if you can see or accept it or wrap your head around it, it is what they are.
Mine are definitely pets and I'm sure they will live infinitely longer than my hamster