Factory and lab production are far more energy intensive than natural production.
We graze livestock on pasture. Solar energy in. Meat out. Very minimal use of petroleum products or other manmade energy. It's a simple easy system that uses our available resources efficiently.
Meanwhile, at the other end of the spectrum you have Confinement Animal Feeding Operations, factories and laboratory production which require enormous inputs of petroleum products and energy for powering machinery, producing fertilizer, transporting raw materials, moving air, water and wastes, etc. All of these are energy intensive production.
The former, pasture raising, lets it self well to small farms. The latter, CAFOs, factories and labs, are the domain of Big Business and central economic controls.
Get involved in food production and this all becomes very obvious.