Asians spend much more time than others on homework. [1]
1: https://journals.sagepub.com/doi/full/10.1177/07311214221101...
1: https://journals.sagepub.com/doi/full/10.1177/07311214221101...
Which is what? Studying is hard, getting academic success is hard, and there is a positive correlation for both of those and career success, as academic success requires discipline, grit, and hard work, which are all useful for career success.
The goal was to actually do a better job of finding the applicants with discipline and grit, not just the ones who have it in an academic context.
You think you need to work hard to get a high SAT score?