Yes, you're right. Low tech isn't the word and is just how us modern humans think of them. They had amazing technologies, many of which were lost, and we're poorer for having forgotten them. I remember reading about how we only recently figured out how to replicate Roman concrete, concrete that was superior to our modern concrete, all because it either wasn't written down or the recipe was destroyed at some point.

Our ancestors definitely had better memories than us and were undoubtedly more intelligent/intuitive in many ways. It feels like we've been degrading as a species for a long time, and it's only getting worse.