It’s also rather inaccurate. One can use a primary source like the DOT for information to add to an article. It’s just that a primary source like that doesn’t contribute to general notability and importance of the subject matter. The subject needs to be shown to have relevance that has been covered in other forms than just primary sources.
Those secondary sources often aren’t reliable as well. It depends on the source and its history of accuracy in reporting. There’s plenty of newspapers that have been determined to not be a reliable source, including any tabloids.