"In my youth, professional critics sometimes dismissed non-European classical musicians for lacking the cultural insight needed to penetrate to the core of Bach, Beethoven, and Brahms; today you almost never hear such claims from professionals. They have instead come to recognize non-European classical musicians not just as equals, but as full members of a culture with no geographical boundaries or privileges." On Suzuki from
here.
Just to say, the quote both confirms some of what the OP quoted, but also argues that classical music has moved well beyond that.