Verified answer

Because technology doesn't produce resources. It only allows us to use them. Things like oil, coal, wind and sunlight cannot be produced, and technology can only help us to use them more efficiently (or at all).

Coal and oil are highly concentrated energy sources, packing thousands of years of solar energy into a compact form. Wind and solar power, even though their absolute amount is huge, are more diffuse, and work with solar energy in real time. So the amount of technology we have to have to utilize them is more difficult to build and far more expensive.

DK