Now if scientists can figure out how DNA from a Siberian species of hominids, neither Neanderthals nor Homo sapiens, ended up among some New Guinea people, I figure most of what’s worth knowing about the world will have been solved. That incidentally includes any questions around the human condition.

Well, I agree that the way that DNA gets to subsequent generations is very much worth knowing (and is usually quite pleasant besides). But I don’t think it’s a mystery, except to the young or exceptionally naïve. :)

Actually, not all scientific terms were invented by English-speakers. Even when they were, they were often invented by people who were thinking of Latin or Greek origins.

In several scientific disciplines, “primitive” has a serious, non-pejorative meaning, on account of its Latin origins. Think “primus”. In mathematics, there are “primitive” polynomials and “primitive” ideals and other “primitive” things; computer science has “primitives” of some sort (I forget what); etc.

I strongly suspect the use of the word “primitive” by archaeologists has a similar origin. You might want dial down the displeasure a notch.