I think a lot of the time people miss the positive side of these stories.
It's not just a story of impoverishment, its also story of adventure. If you were going to backpack around the world, you're certainly going to be sleeping somewhere dumpy, eating poorly, dealing with crazy situations, etc. But thats okay, because you've accepted that you're trading off comfort for some unique experience.
When I was a teenager, my friend would crash at my house and we'd just hack on our websites, play computer games, and occasionally step outside. For weeks at a time, that's all we'd do. And honestly it was some of the most fun and fulfillment I've ever had.
You don't really get to do that as an adult, except in extreme cases like when you try to build a startup. Life isn't about necessarily optimizing for comfort or salary. Sometimes its more fulfilling to do what you want to do, where you want to do it, on your terms.