Given how violently the rear headrests snap down** when you push the Settings > Controls > Headrest Fold button on the touchscreen - perhaps they couldn't find any grommets that would hold up.
** I call this the "Auto-Guillotine" feature. For back-seat passengers you really don't like.
** I call this the "Auto-Guillotine" feature. For back-seat passengers you really don't like.