Studying to pass the SAT is gaming the system if ideally we want well-rounded, whole people to be the elite leadership in the future. Not that including extracurriculars doesn't weight admissions towards the children of current elites. But the idea is that multiple metrics cancel out the biases of the individual metrics. And I understand some people are okay with elite education and others think that is itself the problem though.
Well rounded and whole is an odd term. Can you explain that another way? Everyone who becomes sufficiently specialized and proficient in one thing is limited in the breadth of their experiences due to their metaphorical 10,000 hours being spent somewhere else (study).
Since Harvard is undoubtedly where so many future leaders come from (perhaps another entirely different problem), a better description might be leadership qualities.
