That's true for a lot of pictures (especially of people). This one shows the point although there is a bit of light coming from the side and with photoshop I could easily fix it. But it's best on these types of shots to get the light on the faces. However, there are situations that cry out for a backlit shot.
or highlight forms.
or life frozen in a world of snowy lace.
Try taking some shots with the light in front of you. You might be surprised at what you get and what statements those pictures make.
Application to writing? Don't always show things in one light. Let the illumination come from all directions.