What do you think is going on here? There isn't enough evidence to create an accurate truth, we've got no way of deciding if an accurate truth has been uncovered and it doesn't matter at all anyway. The process by which "truth" is found has a heavy bias towards good storytelling and typically strong political overtones.

Do you feel HN is upvoting the story because anyone feels that accurately depicting the neanderthal lifestyle will have profound bearing on the course of the modern world? I doubt even the historians think that. Maybe something will come of it, but realistically everyone is in this for the fun of imagining what might have happened, and the joy of arguing about it confidently from flimsy evidence.