The question I think is how we are weighting extra-curriculars. How does piano compare to... say.. windsurfing? I'd put both about on the same level as far as merit goes (one taxes the mind and dexterity, the other taxes the body and dexterity, both are fairly out of reach for the underprivileged).
If the "holistic admission" thing is being used to disqualify Asian candidates I would expect that two students with equal grades would be disadvantaged if they played piano rather than windsurfed.
From my anecdotal experience, I find this very plausible. (I'm a white guy who had extraordinarily poor grades in highschool yet was accepted to the school of my choice. My Asian peers almost universally far outclassed me in academic skill (proper student discipline in general); if you told me that I was accepted because I was on the swim team instead of another student with better grades who played the piano (both forms of self-improvement, not community service), I would not be surprised. Very disappointed, but not surprised.)
What about diversity of extra-curriculars? I don't know how it breaks down, but maybe they felt they had enough Asians (or anybody) who play the piano. Maybe you got in because they didn't have that many people who swam as an extra-curricular.
As far as I am concerned, a sport is a sport. I primarily swam, but I did some track as well, and did and continue to do casual weightlifting. They work different muscle groups but they are all fundamentally the same (all have very low leadership/teamwork opportunities, all require a decent amount of drive and dedication, etc. These are all fundamentally "selfish" sports; most participants will spend most of their time competing against themselves). The other class of sports, the "team sports", are fundamentally different of course but also essentially all the same.
So do universities honestly think they have too many classical musicians, but not enough casual athletes? I don't think so. That seems incredibly implausible. I don't think they are thinking anything at all along the lines of "we better introduce some athletic viewpoints into our student body, lest all the musicians dominate discussion."
I think they are arbitrarily classifying hobbies as "well rounded" or "square" to allow themselves to shape their student body demographics to their liking.
If the "holistic admission" thing is being used to disqualify Asian candidates I would expect that two students with equal grades would be disadvantaged if they played piano rather than windsurfed.
From my anecdotal experience, I find this very plausible. (I'm a white guy who had extraordinarily poor grades in highschool yet was accepted to the school of my choice. My Asian peers almost universally far outclassed me in academic skill (proper student discipline in general); if you told me that I was accepted because I was on the swim team instead of another student with better grades who played the piano (both forms of self-improvement, not community service), I would not be surprised. Very disappointed, but not surprised.)