Very interesting perspective. I agree and disagree with your conclusions. It depends on some definitions and context; how do you define "success" and "proficiency"? If the context of success is in the arena of Olympics or Michelline stars, then no amount of "hard work" can compensate for the lack of biological gifts. Also, no amount of discipline will lift someone out of the accident of their birth circumstances; if you are born a peasant in Ugistan or some such hole, then your lot will be that of a peasant.

If "success" is defined as living an above average life with "profficiency" settled for passable skills in a given field, then I agree that most people can achieve their goals with discipline and will-power. A person can improve their skills from 4 to 5 or 6; but society does not compensate people for a 6 skill, when 9 and 10 skilled workers are available. A peasant in Ugistan can live an above average peasant life with hard work, but it would be delusional for him to aim above his station.

I think it is equally, if not more, harmful for children to be deluded into thinking that they can accomplish anything in this society, when they clearly do not possess natural gifts and advantageous circumstances.