The reason for this seems to be the confirmation bias, where people censor the information they obtain according to their beliefs. In the example of the author, we believe that the Newspaper only picks up that which is interesting enough (maybe because it used to be the only source of news). Now, in more modern times, we still believe this and censor incoming information with this filter, resulting in too high a correlation.
One thing though, you're talking about a real-life, fluid situation where interpretations and motivations matter. These are rarely, if ever, captured by classifying them into 'fallacy groups'.