After reading the article you make still less sense.
The article says that blind auditions dramatically increased the proportion of women players. It does not explain why this effect wouldn't apply to other "under-represented" groups.
Clearly some applicants are _not_ "virtually identical in ability" with other applicants.
Let me introduce you to the concept of social capital and how it relates to white privilege.
See, the parents of white (and Asian) kids have, or can buy, access to social networks that underrepresented groups (particularly black and indigenous) are systematically excluded from. That gets the white and Asian kids into better music schools and affords them more opportunities to get good enough to audition to major orchestras, as well as exposure within the classical-music world so people know who they are. This has the effect of reinforcing a certain racial profile for classical musicians.
The solution to this problem has been known since the initial civil rights movement in the USA at least: affirmative action. Unfortunately that means denying really talented white and Asian musicians orchestra seats, so that talented people of other communities have a shot at the levels of achievement and recognition whites have taken for granted. But ultimately, it's for the greater good.
There might be a push, but its success is doubtful. Too many entrenched interests and theories that back them (glass ceiling, gender gap) would be threatened by such development.
The only thing that could actually move the needle is the fact that with a highly skewed sex ratio on campus, female students will find their dating experience unsatisfactory. People place high premium on finding a suitable mate.
Huh? It's already happening. It's not labeled AA, but admissions officers do it anyway because women don't want to attend universities where they are a significant majority.
The article says that blind auditions dramatically increased the proportion of women players. It does not explain why this effect wouldn't apply to other "under-represented" groups.
Clearly some applicants are _not_ "virtually identical in ability" with other applicants.