Babe Ruth was tested like a lab rat, with 1921 technology, to find out why he could do what he did so easily. To no surprise, what they found was freakish super-human reaction and response, superior eyesight. Albert Pujols was also tested recently and got the same level of results. Basically, you're not hitting that fastball, and just as important, a change up, without a "gift" of nature. [google: science of baseball, babe ruth] Before anyone jumps overboard with any artists are better than accountants debate, I'm not trying to go there or make a value judgement. Everyone has a skill of some sort, whether it can be displayed or not. None better than the other. However, isn't the reason artists of all types, are drawn to their craft, in this case photographers, might be because they physically and mentally see the world differently, if not with enhanced mental vision (and I don't mean 20/20 eyesight). What is the "human factor" that can't be tested for in the lab?