English Art/Literary Psychology effects of shame

Dear colleagues,
I’m not sure about how to interpret the metaphor “caul of shame” in the passage below, written by a psychiatrist about the experience and the effects of shame.
I’ve seen that “caul” also means “amnion which encloses the foetus before birth, especially that part of it which sometimes shrouds a baby’s head at birth (traditionally considered to be good luck)”.
So I was wondering whether the author might have used this word to create a sort of “bitter” comparison between a “caul as a sign of good luck” and a caul that in this case shrouds the child with shame from infancy.
My doubt is: when you read the sentence, you also think of the original meaning of “caul” as a possible sign of good luck or do you think “caul” is used just in the sense of something that wraps the child with shame?
Thank you so much for your patience!

Here is the passage:


Acute shame can be understood as leading to the development of enduring shame-laden mental states Early experiences of repetitive shame lead to chronic shame that is dyed in the wool from which the fabric of an unsuspecting child’s mental life is spun, *** a caul of shame ***created so early that it has the subjective experience of a given.