Captain Birdseye is absolutely correct in what he says, but what he says strictly speaking refers to music based on the tonic - dominant system of harmony; i.e. classical music and music derived from the structures of Western classical music.

Traditional music is not based on this structure but has retained features of older musical forms and slightly different terminology has come to be used, in this case using the term "minor" as a generic term for tunes in modes in which the minor third is a key interval.