... they require a more or less fixed amount of energy in order to move stuff around. In order to transport a person you need enough power to move his body the required distance. In order to build a building, you need enough power to lift the materials into place.
There's no hard lower bound on the amount of energy needed to move something horizontally. Any expenditure in transportation is all friction, no work. Now, reducing friction turns out to be a harder engineering problem than making smaller transistors, but just saying "energy" doesn't explain why.
And the gravitational potential energy in 1 ton of stuff lifted by 1 storey would cost all of .001$ if bought from the grid in the form of electricity. So clearly the energy requirement of lifting construction materials into place is not the primary cost of construction either.
So clearly the energy requirement of lifting construction materials into place is not the primary cost of construction either.
The cost of the fuel itself is not the only cost that increases when the amount of energy increases. When a large amount of energy is applied all at once, it becomes important to apply the energy correctly, because otherwise the results can be catastrophic. If you take the energy required to lift a ton one storey, and misapply it, then you could damage property or, worse, kill people.
We let children ride bikes but not drive cars....
From Mike Darwn's Chronopause, an essay titled "Would You Like Another Plate of This?", discussing people's attitudes to life:
Conclusion, graphs, and references in article. As usual, I recommend reading Chronopause.com as Darwin has many good articles; to quickly link a few: