I feel like a natural parent-brain thing is that the brain just sits there in the background kind of brainstorming worst-case scenarios and then you make efforts to protect against the ones you've thought about the most, because they're giving you the most anxiety and you want to stop thinking about them.

Protecting against that one thing doesn't stop this brainstorming process; it's a creative endeavor limited only by the imagination.

Meanwhile, yes, the more constant the news is the more it fuels our imagination, and the more global it is, the more we're feeding it with statistical outliers.