Personally, I don't see any reason each orchestra can't come up with its own basis to select its members, and you can let people vote with their feet.
I'm not super convinced by my own reasoning myself, but I can make a better steelman case for this argument than the typical "racism against groups we don't like is anti-racism" woke schlock I often read. The argument the article makes is simple, plainly stated, free of bullshit, to the point.
I'm generally a fan of this concept. It forces people to acknowledge and deal with the pre-existing random element rather than false precision of saying X is best for this role. (Says who? By what metric? Are they infallible?) and stops people overinvesting in attempts to game that metric.