FWIW I’d argue that the obvious value of musical education is obviously that it helps kids become less musically illiterate. (A condition that’s incredibly widespread today, and which leaves people less equipped to appreciate diverse music of all kinds.) This is not to say, “leaves people less equipped to appreciate ‘obviously superior] classical music”: whatever you enjoy, you enjoy it more/get more out of it/appreciate the skill/art of it when you’re literate and have the tools to listen critically and respond thoughtfully.