"who want to tell women that they are making up 'fantasies' in order to 'justify' choices they've made about their own bodies"
So you think women don't create narratives around their experiences of birth and parenting?
here
"Narrative psychology is a perspective or focus within psychology, rather than a separate discipline. Psychologists interested in narrative study how human beings create meaning from experiences by portraying themselves as protagonists in stories. Narrative psychologists believe that stories, rather than logical arguments, are the primary means by which we communicate meaning and values, according to the Psychology Department at Le Moyne College in New York."
This is a legitimate area of study.
And actually someone has already written aninteresting book about it in relation to feeding choices and experiences:
Breast Intentions
Not original research but a very interesting exploration of the psychology of infant feeding decisions and behaviours in mothers, and what bearing these may have on the likelihood of breastfeeding success. It's a really good read.
The author is currently undertaking a doctorate looking at the night time parenting and feeding behaviours of bottle feeding and breastfeeding families.