Hi Graham,
You didn't say what her answer was
Ostrich like tendencies characterises her response. Walks off in determindly to the washroom without making understandable comments (I can hear comments under her breath). The word cantankerous comes to mind.
Generalising horribly here; I might guess that she's fed up with seeing attractive photos of celebrities which she knows are 'photoshopped'.
She doesn't like watching TV or reading magazines so he exposure is limited compared to average.
Being "non camera obsessed";
a) she doesn't know what's involved in image capture and hasn't 'thought it through'
Most assuredly. She has her way and it's the right way and nothing can make her change her mind.
b) I bet she'd like the results of what say, Colin could shoot of her
Probably not. No matter how good it was, it wouldn't be real. Unless taken under conditions that she accepts, probably with a film camera, no posing whatsoever and definintely no consideration as to lighting.