Her pictures should stand on their own. Are they interesting? Do they make you stop and examine what's going on and wonder? Do they tweek your interest? Do they make you smile? Cry? Be happy? The rest about how many pictures she took, the fact she wasn't known, was a nanny, lived in Chicago, that her "work" should be handled by a museum and not by "profiteers", do not mean anything other then raising interest.
Do you like her photos?