I think the GP, while painting in a broad and cryptic strokes, is stating that Eva was chosen so as to overtly appeal to women, and not because they were interested in their actors accurately portraying the reaction to being in slavery. They want the public to think "Women won't be treated as objects in this movie (as happens in real world parallels) so come on down and enjoy the movie filled with strong willed women who don't need no man". Had they instead gone with an actual psychologist they probably would have ended up with a more realistic movie where the women would have been completely physically overwhelmed by the patriarchy and subjected to numerous atrocities (as in Somalia today) and would have had zero say in the plot of the movie. It would have ended up just another macho action movie that women everywhere would have been up in arms about.
Eva was not picked to give a realistic response to the situations the women in the movie find themselves in, instead she's there to ensure that women will find the movie enjoyable, which isn't a bad thing!