In the scenario you’re describing (a walled off preserve), said folks could decide to join ‘the space age’ by walking to the next valley if they wanted to.
And that is someone Stone Age folks did regularly, walk to other valleys.
In the real Stone Age, that means they see another group of Stone Age folks. In the space age scenario, that means they get exposure to some space age stuff.
So they’d be making the choice to stay, by staying, if they don’t do that.
No one is building a fence to keep them in, just like no one was working to keep ‘the man of the hole’ in. If someone does make a fenced off area around them that is impossible to escape, then sure that could be a problem. It’s a prison then.
But that’s not what anyone is proposing I can see.
They were just working to keep others from going in and screwing with him.
He knew there were others out there, he just didn’t want to be bothered - and they were trying to help him do that.
But they don't, unless they actually get exposed to it. "They've heard a machine and it was loud and terrible and knocked over a tree" doesn't mean they're making an informed decision, because e.g. they don't know surgery or antibiotics.
> They were just working to keep others from going in and screwing with him.
And that's fine, but he's not making an informed decision to stay in the the forest because he prefers that way of life. He's doing what he knows and doesn't do what he doesn't know. That's not a choice. Before Fosbury developed the Fosbury Flop, other athletes weren't choosing to not jump that way.
By the criteria you seem to be using, I’m not sure it’s possible for anyone to ever make an informed consent about 99% of anything, since practically speaking there are near infinite possible options available for almost every action, almost all of them impractical or pointless to even discuss, and most of them more damaging than they are worth to even bring up.
For example, it doesn’t seem like a reasonable requirement that someone spends a bunch of time doing cocaine so they understand it, in order to not want to do cocaine.
If the tribe wanted to know more about the big scary machines, they are free to try to contact the folks and learn more.
If they want to stay away from the giant shitshow that is modern society, that’s fine too. I can’t necessarily blame them either!
They don’t need to spend a lifetime learning all the myriad reasons why just to not be exposed to all the myriad reasons why.