When I first heard about this story, I was siding with the photographer. Then I read a bit more about the story (e.g. The Torygraph), and realised that the photographer had NO input whatsoever into the set up.
The monkey stole the camera from him and took random pictures.
If the photographer had trained/encouraged the monkey to use the camera, then that would be different. But in this case, the photographer did nothing and got a lucky shot or two. (The Torygraph article says the monkey took hundres of pictures)