My understanding was that the author isn't against static websites in general, but rather is against kludging together a functional equivalent to a CMS with backend scripts or third-party tools, when a RDB would be faster and simpler.
To expand on that, sqlite3 will most likely work best for 98% of all blogs out there. You hardly need a dedicated RDBMS service if 2-5 people put new articles few times a week.
