Private house ownership isn’t funded by the taxpayer – nor does it have any influence over the state of the nation. So calling it a racist structure would be a false equivalency. I am not saying the royal family is racist, a liberal will let people marry whoever they want if they want to – I’m saying the structure of monarchy is racist.
And yes, if you do a search elsewhere in the comments, I have also made the point about other monarchies too. Any single race, operating a genetic line of succession; including African royals, Japanese emperors and even the Kim family in North Korea is racist.
The structure of governance does not grant an equity of opportunity to citizens of all skin colours from that nation. That doesn’t happen with the British PM, the fact they’re all white men and women is neither here nor there – the structure allows for a black woman or an Asian trans-man, they just have to be voted in.