If you ask this on the basis of high school textbooks being used today, I would mention that they lag far behind the practices of modern historians. Although teachers in these settings will often use primary and secondary sources to illustrate the pitfalls of relying solely on the latter and other further removed materials.

Like with the journalist question, many people take on the title without the qualifications or ethics, merely using it to promote their slant, which I will grant often makes for a more exciting story.