Americans have no royal family. That’s why Obama can get away with same insulting and obnoxious things, and people (many on this site) can say insulting and obnoxious things back at him.
The British monarchy, at least as it exists today (and sort of exists in the commonwealth “realms”) is apolitical. It would be nice if there were someone in Washington who was apolitical (who could be the “adult in the room” when the politicians gather). Even if you ignore the biological connections to the British (almost everyone in Britian other than a recent immigrant is related to the royal family if you go back to its origins a millenia ago), it’s nice to have a family that are public-spirited celebrities that serve the country and the people, but aren’t tools of partisan bickering.
Not to mention babies are inherently good, which is why Ha-Shem makes so many of them.