You won't give up on the paying for by the uk tax payer paying or RF and accept that its just not how it works , whatever you think it should be .
Its been widely known in the uk that charles wants to slim down the monarchy when he is king , its a case of moving with the times I guess as the uk is vastly different to when the queen was crowned .
Yes, it has been widely known that Charles is determined to take it all for himself and his heir. But the non-provision of security doesn't necessarily have to be a part of the slimming down.
The times don't change so much that the murder or kidnapping of the son or grandchild of the king wouldn't be an enormous coup for a terrorist organisation.
Security provision isn't about the future of the monarchy. You persist in conflating these two completely separate things and refusing to question the boneheaded decision to withdraw it based purely on the RF's view of what constitutes status, with no reference to actual threat and risk.
Security provision is about taking sensible precautions against terrorist attacks, or even attacks by armed individuals with bees in their bonnets.
It is about reducing overall vulnerability to terrorist acts. Maintaining adequate security that addresses risk level is part of being a good neighbour.
The US will not thank the RF or the UK government if an American right wing racist group succeeds in attacking M&H and their family. Successful attacks embolden copycats. Attacks anywhere on American soil would embarrass the government and create a danger of destabilisation.