A couple more ways that reveal that the neutral part of the image is meant to be a memory.
Some posters have mentioned the dowdiness of the female dresses in the KH. That is a visual clue that it is 'old-fashioned', in the past.
The little girl has the same outfit as the woman seated beside her. I remember years ago when it was common to dress the generations alike. What that visual device does, though, is evoke an emotional response based upon that similarity of pattern - it bonds the little girl to the other woman.
And that is what this image is meant to do. It has be designed and carefully planned in such a way that almost each and every viewer can find themselves in that image. And each of us will react in a personal, emotional way. We will all react differently, but for the JWs still in, I think the WTS wants them to feel sad.
The WTS doesn't want the JWs to think of the life that the ones they have rejected are leading now, they want them to feel sad and pitying for the 'good' life they left behind.
It is misplaced pity.