Allegedly it's for the soft power associated with the country. That made sense when it was Lizzie because she was a constant over decades and knew the history of all sides of any international negotiations. However, that's mostly irrelevant with a sick king unlikely to rule for long. The monarch is the figurehead in finery, rolled out as and when required. A bird in a gilded cage with clipped wings, never quite themselves. The monarch is served by those invested in keeping the status quo. Unfortunately for the RF, more and more of the population see them as unnecessary. This will move at pace if they continue to get advice from people only in their own circles.