I actually think that last one just sounds straightforwardly (hah) right? Note shapes express subdivisions of duration that correspond to common rhythmic structures of music, so if jazz music often uses an uneven subdivision at one level but follows the broad structure otherwise, then skewing the meaning of that level in the note shapes is bending the map toward the logical shape of the territory.
I actually think that last one just sounds straightforwardly (hah) right? Note shapes express subdivisions of duration that correspond to common rhythmic structures of music, so if jazz music often uses an uneven subdivision at one level but follows the broad structure otherwise, then skewing the meaning of that level in the note shapes is bending the map toward the logical shape of the territory.