For something to be damaging there would have to be some damage somewhere. You wouldn’t describe a bad head cold as dancing and that will absolutely lead to a pissed off two year old with trouble sleeping for several nights.

When I taught kindergarten one of the children in the youngest class at the time was terrified of the Eensy Weensy Spider video and of the Elephant in a Hickory Dickory Dock video. I told her to close her eyes when it was coming up. She did. Eventually she got over it.

The idea that a scary clown can be “damaging” is a testament to helicopter parenting. Up to 1900 it would be a rare person indeed that didn’t have siblings die before they were ten and basically no one would make it b that far without having a friend or family member die. That’s trauma. That’s damaging.