My (totally uneducated) guess is that most people typing "unprofessional hairstyle" aren't looking for a make-up example they can follow: they're looking for fu

My (totally uneducated) guess is that most people typing "unprofessional hairstyle" aren't looking for a make-up example they can follow: they're looking for funny pictures. So if the top ten results are black women (or Asian guys, or British royalties, or whatever), and if they look funny enough, then users will be satisfied and stop looking further. So whatever pictures that went up there first stays there.