Would this picture of a girl receiving a facial say more if I showed her whole head? You got that she was hungry, right?
I think we love to fill in what's not there.
That's part of why not using an entire subject is often pleasing in photography. The viewer's mind is not taken for granted.
Application to writing? We don't have to include every detail for the reader to get a scene. If we paint the portion we show well, the reader will see it all and be glad the writer didn't show more than the essential. (This is something I'm working on. I tend to think I have to say everything. I'm going back right now in WIP 1 and eliminating the things that don't need to be said. I can wear a reader out with minutiae. Hopefully, I'll be able to make the right choices.)
Have a great weekend!