The media sell what the culture buys. Because information is a commodity item, it must cater to the tastes of its consumers. In other words, information is shaped by cultural priorities. The priorities of contemporary America include selfishness and entertainment. Therefore, information should be about me and be fun.
American culture is also increasingly visual.
Therefore, information should be visual or at least contain lots of color pictures. Publishers may hold their noses when they publish some books, but if those books sell, those books are published. Self help books take up many feet of shelf space in the average bookstore because those books move through the cash register and out the door. For the time will come when men will not put up with sound doctrine. Instead, to suit their own desires, they will gather around them a great number of teachers to say what their itching ears want to hear.