What's Behind the Cybersecurity Jobs Shortage?

In 1999 cybersecurity pundit Bruce Schneier answered questions from Slashdot's readers.
24 years later on his personal blog, Schneier is still offering his insights. Last month Schneier said that warnings about millions of vacant cybersecurity positions around the world never made sense to me" — and then shared this alternate theory. From the blog of cybersecurity professional Ben Rothke:
[T]here is not a shortage of security generalists, middle managers, and people who claim to be compete