I don't think the judge would have ruled this way if it had been a coincidence that the photos are alike.
I certainly understand what you're getting at, but everything that we do today is based off of some idea that came before us. Is a certain level of indirection required for an expression to be considered appropriately unique?
From the article, "..there is a line between copying ideas and copying the original expression of ideas...", I would consider that opinion to be both myopic and absurd. We stand on the shoulders of giants - nothing created today can ever be considered to be truly "original".
Society needs to draw that line somewhere, to balance the free dissemination of culture and the possibility to make a living off creative works. As long as you are living in a democracy that needs to balance different opinions and make compromises, you'll never be able to get rid of this (unless you simply ignore the law, of course).
Do you know of a link? Googling is not working for me, mainly because of all the images of coloured kool-aid drink and all the DIY sites on dying yarn with kool-aid(!).