In that time there is relatively little figurative art of humans. Rarely seen in cave painting, etc. The nearest would be the Venus figurines but they don't typically show facial features or internal anatomical details. It's a major major find bro.
I've heard that much of the ruins from Ancient Greeze were likely brightly colored and painted. I can't help but wonder if the Venus I mentioned had been painted as well. It's possible that they did have detailed faces, and that they simply weren't sculpted.
I'm the furthest thing from an expert of course.
They had very similar general intelligence and talents as us, at that time, and tens of thousand of years before. Today, it’s not terribly hard to find artistic kids who can mold extremely good faces, ponies, or whatever else they choose, from a lump of play dough. I assume artistic people existed then too, with comparable talent and frequency, unless there was some catastrophic non-artist pruning that happened very very recently.
Also, the "they" you refer to is "us".
If they’re “us”, then that statistical review should show similar distributions to what we have now, especially in children. Can we see the artistic child’s work? It’s probably made of mud, so probably not. We only see accidents of preservation, due to the tools and final materials.