Parmandur
Book-Friend, he/him
No it doesn't, the episode clearly state that if the characters don't enter the town than the cult forces pillage and burn to thier heart content and leave at dawn.
Warder
Yeah, the writers take consideration of a number of probable actions that players can take; sure, it requires meta-game buy in, but guess what? New players generally have boatloads of meta-game buy in, as they come in highly conscious of this being a game. It takes a certain amount of experience to get so into character as to make realistically smart moves instead of action movie or video game moves.