I honestly don't understand the "If you work hard enough you can do anything" mindset.
To me it's clearly, obviously, objectively wrong - because otherwise you'd be able to take take absolutely any random child and turn them into a chess prodigy, a musical prodigy, an art prodigy, a literary prodigy, a sports prodigy or a STEM prodigy just by hot housing them.
There's no doubt a lot of talent is wasted by circumstance. But does anyone really believe that at the top levels, hard work will compensate for lack of aptitude?
Edit: Polgar experiment. Inconclusive without a bigger sample and a control group, surely.