>Vast majority of things must be flown or shipped in. I am hard pressed to see some "techno libertarians" doing techno without Amazon/Temu/Walmart/<insert fav vendor> in 24h drop ship.
I think this is an unreasonable bar. All the fertile land in the world has been accounted for. There's no way to accomplish that type of sustainability without conquering existing land or some major technological breakthrough.
I think a fair bar would be economic sustainability. Plenty of countries depend on trade for food, but can make up for it in exports.
I would reframe this as the rent-seekers not wanting to create anything for anyone else.
The reason Pirate-Monaco-Dubai-Island isn't productive is because all of the productive land is being squatted by rent-seekers. There is some history that indicates that anarchistic sort of socities can be productive, for example kowloon walled city.
True, but this is what distinguishes libertarianism from anarchism. Libertarians aren't pursing anarchy, they're pursuing a minimal government and a global environment that makes governments compete on taxes/protections/benefits/etc.
The most extreme form of libertarianism, minarchism, still proposes the existence of a government