The conspiracy theorist in me says this is just a convenient ploy for the Royal Family to stay relevant and avoid falling behind with the "progressiveness". William went the traditional route and he already produced his heirs. They don't give a fuck what Harry does because he's never gonna get a shot at the throne anyway. Instead, letting him have his way and marrying a black woman would allow the Royal Family be viewed as "progressive". They can continue to stay relevant and avoid getting dragged down by the extreme leftist.