So he also had torches and stuff in his inventory, huh?
@MyriadDestiny And fall 8 meters face-first to your death anyway. Or back-first, break your spine, starve to death while paraplegic.
Nah, let's go with digging.
@Mathiason You're not wrong, but as all things, "it depends on the universe".
Take, for example, a universe where a Production class makes weapons or food (out of thin air). Sure, they don't fight, but withour them they're probably screwed.
In THIS universe, however, it seems everyone was given just one skill. He got Purification. And while we can't be sure, Level 2 seems pretty low, meaning he's not using it much. He's not "producing" food, just detoxifying it. And I'd say not all food needs that.
Point is, from what little we've seen, it's totally possible that he is, indeed, useless.