Miss Haversham is overstating it a bit, perhaps

but certaintly the music as identity-formation syndrome does, in most cases, have as ultimate destination some variation on the Saxondale scenario

you work out what you're about, and you make your stand there, Canute-like

(Analogous perhaps to that Quentin Crisp quote about how "Style is deciding who you are and being able to perpetuate it" whereas "Fashion is never having to decide who you are.")