Does this also include the labor to find/mine/refine/ship the fuel and the labor to mine/refine/shape/assemble/maintain both the factory machines and the farm equipment?
In contrast, 10-tons of horse feed will only feed enough horses to carry maybe 10-tons of actual product, depending on distance.
I forget the math exactly, but there's a reason why the horse-to-automobile tranformation only took a decade. The difference between horse-feed and gasoline is completely massive and almost an unfathomable increase in efficiency, due to the ratio of "fuel-per-ton" (ie: horse bread in the 1800s vs gasoline in the modern day).
We first had horses producing far more manure than a city could handle, with all kinds of hygiene/smell/viability consequenses. People complained how cities became unliveable.
Cars fixed all that. No more feed, no more manure, no more raising and keeping alive the animals. All replaced with a very energy dense fuel, a machine you can just leave on the street, and some very clean minimal exhaust.
Then we all got cars.
so by extrapolation, would we need the world to become unliveable before cars gets replaced?