If someone has one remaining opponent and thinks that they will die, wouldn't they be forced to go into the dungeon themselves to save their opponent?
Yeah I guess there is that too. Perhaps it's the type of rule that helps more at the beginning of the game?
Or perhaps it's not an issue at all. The thought mostly came about watching a game where someone won because they sat out all the time. Until the end it didn't matter so much as there was always at least two people playing the game while they passed early. However maybe that is more the exception than the rule and the majority of games don't play out like that.