Sorry, OP, I went on a mini-rant and didn’t answer your question.
Yes, I think children have irrational fears but what I was trying to say is that I think those fears have changed, on a societal level. I think we are underestimating what a huge effect it has when a population is constantly being injected with fear. Constantly. Yes, these “fears” are what are supposed to keep adults tuned into the news or to make them want to buy certain products, but children are also consuming this media without the agency that adults have, meaning that fear and worry are more likely. An adult sees a commercial that talks about life insurance and it makes them think, “maybe I should get some.” A child sees the same commercial and it may kick off a (irrational) fear of their parents dying.
Children simply do not have the tools and rationality to fight against what social media and advertising and ALL media are trying to force on them, in terms of fear and worry and anxiety, which is why this court decision has been made against Meta and YouTube. I think cBeebies is about the limit of what I’d let a child watch, and having seen YouTube ads (and comments by men in their 50s on a video of a 3-year-old girl in a paddling pool) myself, I would never let them on that platform.
It is also not a surprise to me that, as a result of the first generation that grew up with a 24-hour news cycle - and then I feel as a society, that we’re constantly “bathed” in either true crime or crime drama (I think a generation that grew up with Law and Order SVU, which JUST focuses on sexual crimes, is going to have a LOT of anxieties) - we’re seeing increasingly anxious-style parenting, either general anxiety or often health anxiety. Our parents were the depression generation (first widespread use of antidepressants); we’re going to end up being the anxiety generation (I swear, seems like everyone I know born in 1983 has anxiety of one type or another), and I don’t know what today’s kids will end up being.
So yes, children will always have irrational worries, but I believe those fears have sadly changed from a crocodile in the bed to being raped and murdered.