A saying, atributed to Lincoln, is that "you cannot fool all of the people, all of the time" which is, however, contrasted to P.T. Barnum's dictum that "there's a sucker born every minute". There is something, in a large segment of the population, which makes being fooled, pleasurable. There is a very old word, in the English lanuage, "trumpery" signifying "attractive articles of little or no value" which indicates that the trait has been around a long time. Look it up.