All of these articles referenced an article that Oliver Lee, an assistant professor of history at the University of Texas at Arlington, wrote the Vox news and opinion website: "I Have One of the Best Jobs in Academia. Here's Why I'm Walking Away."
I spent six and a half years living in the Dallas/Ft. Worth metroplex; I have been to UT Arlington; I even spent some time looking up Lee's background, and I would never agree with his title. But it is probably a bit unfair to pick on one professor, even if his essay got a lot of attention. The Flaherty article makes it clear that a lot of others are quitting academia, and writing about it. My read of the article is that the people who are going public often have very good options. Lee, for example, has a law degree, and is apparently starting a legal career. Others are going into the corporate world where they make much more than a college professor, even one at a very good school.