I remember reading Into The Wild in my twenties and feeling a strong connection to Alex. Even if going to the bus wasn't a wise decision, I feel it's only human to want to cultivate those types of connections. I never went to the bus, but I was definitely curious what Alex was experiencing in the final days of his life.
I agree with GP that it's a cautionary tale, but it's more than that. It's caused thousands of people to think more about the way they live their lives. Seems a bit more substantive than simply trying to get a selfie, don't you think?
It used to be that Everest was a crowning achievement in a mountaineer's career. To top out, you would have to climb many, many other mountains in preparation, building skills, physique, and relationships with other mountaineers.
But now people regularly reach the top of Everest as their first (and often last) summit. If you have never reached the top of a major mountain before, you're a beginner mountaineer. And if Everest is summitted by dozens of beginner mountaineers every year, it's a beginner mountain. The primary barrier to Everest now is amassing ~$40k in expendable income to pay sherpas to drag you to the summit.
It's worth noting that what the sherpas do is still extraordinary.
I think they were saying that going to a place because it has meaning for an ideal of breaking dependence on society is more substantive than going to a place so you can take a picture to get attention on the internet. It's not about the place, it's about your reasons for going there.
The Grand Canyon is a place with incredible splendor, and I am sure there are people who go there for substantive reasons too.
Admittedly, that doesn't make for a good movie.