I get the impression the Yautja we see are the remnants of more advanced society that fell. They're like the Mad Max of whatever society built space ships and computers.
Doesn't have to be. Their society could also be similar to Samurai/Japanese society in that the vast part of the Yautja are not hunters but workers, engineers and scientists that serve the ruling class of the Hunters, kind of a caste system with the top being the ones born to hunt.
We just never saw this in the movies because that was never the focus so the field is wide open for speculation.
