I'm aware of that concept, I'm also aware of the monumental engineering challenges involved in getting a decent amount of land from it. A complex society has to be able to provide itself with basic supplies using only a fraction of its labour force, and that might not be possible if every plot of agricultural land requires a huge structure to be built and maintained around it.

If your entire population has to work full time just to feed itself, your development simply stops.

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"I worry that, especially as the Millennium edges nearer, pseudo-science and superstition will seem year by year more tempting, the siren song of unreason more sonorous and attractive." - Carl Sagan, 1995