And what do you think feeds animals?
Grains cut down by combine harvesters and made into feed.
Not only that but you need far more fields of grain to be made into animal feed, than for humans, due to massive inefficiency losses growing animals.
So yes what you said is utter nonsense and also shows you are clueless of how animals are raised. It's exactly these things, along with finance etc, that should be taught in general studies, not the utterly pointless stuff we did. It should be all the non academic, but life essential stuff rolled into a mandatory lesson.