It really does make perfect sense. I love when artists show us the pictures they have around them. Dick having a picture of Clark in his room, Babs having Batman's, Jim with a picture of Babs on his desk, Bruce with the family portraits, Batman, even, with his rogue's gallery of pics down in the cave, the photo Dick recently took from the Manor to bring to the penthouse. Oh! And Dick's scrapbook!
I love that picture on the wall, too. Looks like it could be a school portrait.