Well, the biggest problem with the idea, it would seem to me, is that fantastical adventures are, quite unfortunately, just that... a fantasy. So yes, you could take a long hike, maybe even LARP if you're the sort who's into that, but it wouldn't really be an adventure, it'd be a hike.
It's not like you can actually venture from one small village to the next, turning in the heads of the goblins you murdered along the way to pay for your meals. That's just not a realistic life plan. Going for hikes in uncharted forests might not turn out that well either. If you actually do find some rugged terrain, for instance if you're one of those people who actually could afford to go off to Africa or South America for your adventure... you'll either be in a touristy area, or a genuinely dangerous place. Hell, Americans who go for vacation in Tiajuana get kidnapped, you think you're really going to be fine taking a merry stroll through the woods?
Adventures are nice in fantasy, because we can be relatively certain of at least this much, we, the viewer will not be harmed in the witnessing of the journey. But this, unfortunately, is not a fantasy, it's real life. You have to pick if you want to take a hike and let your imagination run wild, or if you want to put yourself in real danger. It's nice to imagine an adventure, hell, I'd love to take one myself, but that doesn't mean it's actually a viable option.
