I really enjoy Kristine Vike's videos. She's soft-spoken, well-researched, a working scientist interested in historic textiles and the science of textiles. I'd highly recommend her.
I completely agree with the idea that we would struggle to learn all the things we would need to know to survive, if we tried to learn as adults. If we started as children, our brains would be full of the nuance of the natural world and what we might perceive as resources within it. We would spend all of our time (no such thing as "free time"--free from what?) doing things that mattered to our survival: finding, recognizing, gathering, saving food; creating and enhancing community through shared knowledge, story, song, and resources; engineering ways to interact with our world. So we could do it, and we would, because that's all we'd do, starting from day 1. String is the oldest technology, plied cordage over 30,000 years old being found. The fact that we are often too tired to do the things like fiber work or gardening that we long to do, things many of us learn as adults, says something about how much brain space everyday life takes up. The fact that we can and do make time for them speaks volumes!
Karen