>>96262508
You can't just desaturate a picture to visualize the contrast when there is hue changes, especially with yellow because it's luminance is so much higher than other colors.
I agree with your point a little bit. The top of the boobs and shoulder should probably be a little brighter since they're pretty close to the stomach, but it's not nearly as rough as your pic makes it seem since it's assuming middle yellow and middle green are the same shade of grey to your eyes.