Whenever someone is phenomenally successful, whether it’s Rowling as an author, Bob Dylan as a musician or Steve Jobs as an innovator, we can’t help but conclude that there is something uniquely qualifying about them, something akin to “genius,” that makes their successes all but inevitable.

More people should read "Thinking Fast and Slow" by Daniel Kahneman; it really breaks down how this and many similar biases work and gives suggestions on how to overcome them (althought he's brutally honest in saying that we'll probably keep being tricked by them anyway).