But they don't necessarily all lead to the same conclusion, any more than they do in an Infocom game. Take "Plundered Hearts," for example: Aside from there being numerous ways to get yourself killed (or worse) without ever seeing the endgame, there are four distinct conclusions if you DO make it to the endgame.
It's not unreasonable to think they might wish to start new colonies on other planets - there's plenty of Amish fiction centered around them moving to new communities.