I would bet at least 95% or more, personally. I'd survive okay here (until I got sick or injured) because my local environment is pretty easy to survive in, but I would die quick in a harsher wilderness, I am sure, and I am fine with admitting that!

There's a happy medium between what we have today (rampant consumerism and waste) and what we had a thousand years ago (every tribe for themselves). Perhaps you and I can agree that a lot of what humans do is useful transformations of resources into things that help us (housing, food, much of our tech and manufacturing), and then there is a lot of what we do that is completely wasteful that we could be doing less of (plastic crap, driving to offices to meet on Zoom, perhaps we build houses too large, we build in bad places for humans to survive, etc.).

My previous comment was a bit snarky, but my point via that comment is that not everything we do to transform resources into stuff increases the value of the world, perhaps some wasteful things even harm our world and decrease it's value in the future. You're a smart guy, you understand nuance and that wasting our natural resources, especially the non-renewable ones like oil, in a mostly closed ecosystem is a bad idea.

I figured it was obvious that creating something meant creating something of value.

If someone else is willing to trade for it, then something of value has been created.

P.S. Most people don't know how to make a fire from scratch, and will die of hypothermia in even modest environments. I know how to do it, but have never actually tried it. Doing it without even a knife will be really hard. The TV series "Alone" is instructive about how hard it is to survive, even if you're well-equipped with modern gear.