I think the thing which would stand out in this testimony to a person from the 20th, 19th, 18th century (let’s just say the past) is that the adults let this insane delusion proceed and to literal mutilation. This poor kids “parents” how do they even look at her? Did they even loose any friends over this decision or wher they all in a rush to “affirm” and thus demonstrate their good-ness like the some trained seals that many seem to have become.
There have been fads like this before. The doctor who invented lobotomy got a Nobel Prize for it. There were “lobotomobiles” driving across America performing the procedure on tens of thousands. Kennedys did it to their daughter and suffered no social shunning.
A more recent one is “repressed memories” and “multiple personality disorder” nonsense. People were thrown to jail for absurd “repressed memories” testimonies and murderers were let free because they claimed “one of my 28 personalities did it and it is unfair to jail the other 27”.