I think he probably just didn’t give enough thought to the quality of his reference. But I’m sure he’s aware of the problem now and can do something about it.
Other things to consider for those of you who are working from photo references:
-Are you doing a photo-copy exercise simply trying to train your eye-to-hand coordination and be able to reproduce accurate shapes, forms, values, colors, edges, textures, etc? If so, then be precise–it’s a technical exercise.
-If you actually want the image to be a “painting” that has artistic value, then don’t just copy–the reference should be just a reference, and you must inject your own artistic voice into the painting, or else it’s just a copy of a photo that has no artistic meaning. If you want it to be a piece of art, then give it artistic expression–be it in the form of selective detail, expressive brushwork, interesting colors, interesting lighting, stylization by idealization, simplification, exaggeration, and so on. Decide what should be compelling about this painting.