>>1975524something to do with genetical preferences.
it no longer has any significance in current day and age, but there was a time when blonde hair was rarity and novelty.
since dark gene is most common, naturally we strive to have something more unique, rare by nature. hence the appreciation for "different".
nowadays it became quite a mainstream thing. so I'd say it's not the "blonde" which is a choice for publicly-standing figure, rather, women themselves choose to dye their hair blonde, even though they naturally aren't.
so the more correct way to put it would be
>can hardly see any female talk show host or anchorwoman that wouldn't dye her hair blonde. besides, it helps hide the gray hairs and, widely though, that it makes a woman look younger, masking her age.
also, makes small details/facial features, like wrinkles, less noticeable than on dark hair background.
blonde hair also serves to diffuse the focus on the face. again, making it easier to hide the imperfections, than with contrasting dark hair colors.
this is not the case with horses though
white manes are rather rare in horses, that's what makes them special.