No problem. I'm saying the original poster took Jefferson's quote out of context. There might be an implicit critique in Jefferson's 2004 piece about the limits of an author's identity but the main focus of Jefferson's piece is about the limits of a child narrator, not about the limits of an author's identity.
So yes, Margo Jefferson is a "Black woman critic" but in this 2004 piece she's mainly writing about the built in problems of a literary trope.