neo-primitivism, economic buddhism, or environmentalist minimalism(espoused by Keith Woods) or Fourth Political Theory(advocated by Dugin) are all wholly impractical and suicidal for the same reason libertarianism is.
It ignores the existence of the other.
You can deindustrialize or shift to a zero growth economy with rural lifestyle and pastoralism or whatever trad fantasy you have, but the rest of the world won't. Over time their economies will dwarf that of your own and a larger economy means a stronger military.
A larger economy means a stronger R&D sector, larger military budget and more advanced weaponry. It would only be a matter of time before other civilizations simply invaded your land and exterminated you.
This is the fundamental dilemna of technological progress: there is no stepping back. You must continue to grow and advance or you die. The late Ottoman Empire, the late Roman Empire, the late Abbassid Empire, the late Spanish Empire, the Polish commonwealth...History is full of examples of realms that were picked apart by their neighbors as soon as they stagnated and stopped growing.
Civilization is a one way road. You run till one of two things happen:
A) One race/nation/Empire conquers the whole world and eliminates all opposition. Then it can deindustrialize and go green as it has no opponents left anymore.
B)The wheels fall off. Human civilization as a whole collapses due to either dysgenics, resource depletion or global war.
There's no option however, for a break or a step back.