True, the article is heavy on personal experience, but the numbers really don't look good if you want to be a tenured professor in the humanities. Just look at the number of open positions each year compared to the number of graduates. And don't forget to include the graduates from all the previous years who also want the one tenure-track job in early modern literature (or whatever your field is).

Yeah, the success rate for startups is low, but at least there are different routes to success (side project, bootstrapping, angel, VC, etc). If you want to be a professor the only option is to get a job at a university.