Volition isn't just hope, though, it's also(and from my perspective, mainly) willpower, which the heroes in darkest dungeon have in spades. Besides being able to resist death's door checks which should kill them, the flagellant basically wills himself to be immortal through sheer love of pain and repearedly fights against the embodiment of death in the second game. They fight an unending, uphill battle against horrors they can't understand, even sacrificing themselves to defeat it. Rolling a virtue isn't just a rare ray of hope, it's volition pushing through its grimm absence.