No. With so few monarchies still existing in the 21st century, having Kings and Queens is most definitely a plus. If not for prestige and national identity, then it is for the millions of dollars spent by tourists who come from all around the world to visit areas related to the royal family.
The British monarchy is the constitutional monarchy of the United Kingdom and its overseas territories. The monarch's title is "King" (male) or "Queen" (female). The current monarch, Queen Elizabeth II, ascended the throne on the death of her father, King George VI, on 6 February 1952. More: en.wikipedia.org.