Sports scientists have pointed out[1] that people who are innately good at a thing will do more of it, with less resistance to training, than people who aren't.

The 10,000 hours are done by people who enjoy a subject or activity enough to do it almost constantly. And that usually comes about because of early successes.

This is sometimes called "talent".

[1] http://www.sportsscientists.com/2011/08/talent-training-and-...