I believe we look at black and white images more deeply.
The consistency isn’t only to do with style. Black and white strips an image to its essentials, and I think this lets the emotions come out more powerfully. The little looks, the fierce grip of a child’s hand to their parent, their brother or sister, their favourite bear. I believe we look at black and white images more deeply. Because they show us a world different from the garish one we see around us, they draw us into their mysteries. They suggest rather than showing or shouting.