That’s quite a reductive view to justify hurting a living being. Harm literally means “ physical injury, especially that which is deliberately inflicted” and a chicken whose throat is slit is clearly harmed. Animals don’t die instantly and it’s unreasonable to say “we aren’t harming a chicane by killing them if they didn’t produce value to society.”

I’d expect humans to have more empathy and not try or reason their way into needlessly killing a creature who doesn’t want to die.