It's all jealousy, of course. Why else would we have all the stupid blonde jokes? As Steve Sailer says, "Of course, the dumb blonde jokes are aimed at blonde women (frequently by non-blonde women)."
Of course, hordes of women are not dying to dye their hair black. They all want to be blondes. The anti-blondeness issue is also an anti-white thing. But why the hatred for blonde, Nordic beauty? Because it is a purity that is unobtainable by most? Blonde jokes have never been funny to me, because it's a politically correct, anti-white thing, though most people do not realize that. Ditzes are ditzes and dummies are dummies, and they don't come in specific hair colors.
Sailer even sounds like an Austrian economist on his explanation of the value of blondes: "And that may explain why blonde or red hair never became universal anywhere. First, it would lose some of its scarcity value if all women had it."