Perhaps they'd discover that their purported paradises were as friction-laden as the present, albeit without all the bad, bad technology that ehances our Tartaran present.
“The racist denigration of the savage, and naive celebration of savage innocence, are always treated as two sides of the same imperialist coin.56 Yet originally this was an explicitly right-wing position, as explained by Ter Ellingson, the contemporary anthropologist who has reviewed the subject most comprehensively. Ellingson concluded there never was a ‘noble savage’ myth; at least not in the sense of a stereotype of simple societies living in an age of happy primordial innocence. Rather, travellers’ accounts tend to supply a much more ambivalent picture, describing alien societies as a complicated, sometimes (to them) incoherent, mix of virtues and vices. What needs to be investigated, instead, might better be called the ‘myth of the myth of the noble savage’: why is it that certain Europeans began attributing such a naive position to others?”
> The phrase later became identified with the idealized picture of "nature's gentleman", which was an aspect of 18th-century sentimentalism.
These days the sentiment seems more associated with people expressing unhappiness with complexity.