I've been in photography classes where Photoshop wasn't allowed, although it was pretty easily enforced because we were required to use school provided film cameras. Half the semester was 35mm film, and the other half was 3x5 graphic press cameras where we were allowed to do some editing - providing we could do the edits while developing our own film and prints in the lab. It was a great way to learn the fundamentals and learning to take better pictures in the first place. There were plenty of other classes where Photoshop was allowed, but sometimes restricting which tools can be used, can help push us to be better.