Wdym? They provide all the necessities of a construction site. You can build a house with ancap cement, run the machines on ancap gasoline, while the workers sip on ancap beer. Makes perfect sense to me.
Yeah i know. In rocketry V-2 for example was running on ethanol/water mix with liquid oxygen as oxidiser. And experiments with ethanol based fuel for other kind of engines too never stopped entirely, though the results are rather underwhelming, at least for mass usage.