Just that really. I was having an interesting conversation with my friends who I've known since school. We are now mid 30s. Without fail, all the women we knew from school, whether they were brunette, red, blonde have dyed their hair lighter and have become blonde.
There is so much celebration of diversity and marketing demonstrating beauty of all hues, however it seems that in the Western world, there is still some cachet and preference to being blonde. And this is why so many women bleach/highlight their hair.
I'd go as far as saying that even in the workplace and in general interactions, people perceive blonde as 'more attractive ' and you are treated better as a consequence. I've certainly noticed this when abroad, and my blonde friends get more attention.
AIBU to suggest society still has a bit of a blonde/blue eyed obsession?