Why don't the residents in From use a more believable excuse to keep newcomers inside at night?

I know this question is kind of irrelevant now since the story has progressed so much 😭, but during my rewatch I kept wondering about this

Every time new people arrive the residents try to convince them that monsters come out at night and bullsh*t excuse But from a newcomer's perspective, that sounds completely insane so it's no surprise many of them don't believe it.

Why not start with something more believable instead? They could say there's a serial killer, escaped prisoners, violent criminals, a deadly cult who attacks vehicles, or that the town has a strict nighttime curfew because people have been disappearing or any human or natural threat.

The goal wouldn't be to explain the truth right away it would just be to keep the newcomers inside for one night. Once they actually see or hear the monsters, and get comfortable then the residents could explain everything.

Am i missing something? 😭