Here's a question: looking at these you can see that some people are simply born with a talent for art. Why? What would the evolutionary significance of that be? In complex societies artistic skill can be a good route to financial and thus reproductive success, but why did hunter gatherers evolve this trait? It is clearly quite distinct from general intelligence or verbal skill. It is its own thing, and wherever it came from John Singer Sargent was just born with a boatload of it.