They are not important in the media, politics, universities, historical explanations, or the courtroom. Non-factual explanations of the collapse of three World Trade Center buildings are served up as the official explanation. Facts have been politicized, emotionalized, weaponized and simply ignored. As David Irving has shown, Anglo-American histories of World War 2 are, for the most part, feel-good histories, as are "civil war" histories as Thomas DiLorenzo and others have demonstrated. Of course, they are feel good only for the victors. Their emotional purpose means that inconvenient facts are unpalatable and ignored.
Writing the truth is no way to succeed as an author. Only a small percentage of readers are interested in the truth. Most want their biases or brainwashing vindicated. They want to read what they already believe. It is comforting, reassuring. When their ignorance is confronted, they become angry. The way to be successful as a writer is to pick a group and give them what they want. There is always a market for romance novels and for histories that uphold a country's myths. On the Internet successful sites are those that play to one ideology or another, to one emotion or the other, or to one interest group or another. The single rule for success is to confine truth to what the readership group you serve believes.