I don't agree. I think conservatism is about looking at the world as it actually is, and not as we wish it were. It's about realism, not idealism, something which goes back to Edmund Burke's warnings about the overreliance on abstract thought in politics, and Kirk's assertion that conservatism is fundamentally anti-ideology.
By your own quote you contradict Kirk from the article. The root of conservatism is conserve, save, maintain. To maintain a particular lifestyle. In these changing times where liberalism is turning the Nation a direction people don't want to go, it is natural to fight that change, to fight for a way of life. That isn't idealism, it's action. ...from the article...
Indeed it was Mr. Kirk, the great 20th century American essayist and chronicler of conservatism, who offered the "genius of conservatism" axiom. "Conservatism is not a fixed and immutable body of dogma, and conservatives inherit from Burke" (the 18th century Irish statesman and philosopher) "a talent for re-expressing their convictions to fit the times." Or as Heritage Foundation President Edwin J. Feulner put it in a recently updated foreword to "The Conscience of a Conservative," the classic 1960 treatise of Barry Goldwater (ghostwritten by L. Brent Bozell): Conservatism is "a vision of the nation and the world as it should be, not a compromise with the world as it" is.