We don't and I never said we should. But ho-hum that would interfere with your narrative wouldn't it.
Fun facts for you, if we want to organicly feed people, bearing in mind that we will have to sythesise of Nitrogen by the mega tonne. But we look at comparisons and they fall between 95% efficient down to 66% efficiency depending on the crop and location.
So we must covert more and more land to agriculture. So you then end up having to destroy ecosystems, like forests and jungles and give them over to organic culture. Destroying millions of acres of eco-ssytems killing off millions of creatures, mamals, plants and birds.
So you end up killing off upto a third of the world population and many millions of speices of plant and animals all in order to look after the well being of some relatively few heads of cattle or pig or what have you.
Of course the other option is to eat less meat but continue to farm both meat and vegetables non-organically with GM crops.