Complex societies have collapsed many times before. It has not always been a bad thing. As James C Scott points out in his fascinating book, Against the Grain, when centralised power began to collapse, through epidemics, crop failure, floods, soil erosion or the self-destructive perversities of government, its corralled subjects would take the chance to flee. In many cases they joined the “barbarians”. This so-called secondary primitivism, Scott notes, “may well have been experienced as a marked improvement in safety, nutrition and social order. Becoming a barbarian was often a bid to improve one’s lot.” The dark ages that inexorably followed the glory and grandeur of the state may, in that era, have been the best times to be alive.
That’s like saying the Black Death was a good thing. Sure, living standards improved in the wake. As 60% of the previous population survived to enjoy 100% of the capital of the society. Great, so being a free living barbarian is fun.
If you survive, if you don’t count the experience of those who don’t.