I believe its because then some of us would be able to never actually leave our PC's and just go through the 1000's of images we have saved over the years. This at least forces us all to get up, get out, and use our camera's for a spur of the moment shoot and gives you something to think about while driving/walking/crawling around during the weekwhy cant we use photo's that we have on file? sometimes one takes a really great photo that no matter how hard you try you will never be able to better that photo...