I believe that with the 10,000 hours most people can become COMPETENT at most things. I believe with the work I could draw much better than I can or complete a half marathon. I could not overcome the fact that I am short with short legs or that I do not have natural talent at art.
I could optimise what I do have. It seems silly instead of congratulating people for their talents to blame ourselves for not having worked hard enough to get the talents. It does seem to fit quite well with the American mind set of everyone being able to get to the top (but honestly I don't quite think that was meant that way).