Blond hair just isn’t comely to me, compared to brown. I like the contrast between light skin and dark hair and eyes. Then again, I doubt they’d hearken to an Irish/Polish like myself, regardless of my blue eyes and strawberry blond hair.
But try going to, say, Sweden and say that only blonde is good. Note that the pop group ABBA expected Anna-Frid, the brunette singer, to get more attention, on account of brown hair being an exotic thing in Sweden.