For allegedly being fans of sustainability, this variety of Degrowth™ enthusiasts love the idea of society using the most inefficient ways of achieving anything it possibly can.
But I honestly suspect that a lot of people in this broad political camp aren't even taking a serious attitude toward political change. Like, sure, a decent number are, but many that I've seen just operate on a framework of "we'll do our maximally labour-intensive, dogmatically anti-manufacturing permaculture and The Masses Will Come To Us", or "we can just Do A Prefigurativity and that's the extent of our politics", or whatever.
Which makes sense, honestly. A framework so averse to the risks in anything that people might do to improve our lives that it ends up having to dress its incredibly ascetic prescriptions in fluffy, almost kitschy pastoralism isn't going to be an easy sell — and it shouldn't be.