They hate "not making money". And blond doesn't really sell well outside of certain circumstances in the west.>non-western countries
Blonde is exotic, interesting, and cool.>western countries
Blonde is a rarity associated with elitiness, cheapness and fakery due to all the hair dye. Most people find brown hair relatable.
If this strikes you as shit, then pay attention, because everything else that's shit with everything stems from this common root: spineless advertisers.