This doesn’t do justice to the world building of Dune. Technology is very limited. Computers are banned (for good reasons), and using those energy weapons is also forbidden in most situations. Thus, combat is once again dominated by the kind of melee encounters that were also historically the domain of a trained warrior caste. All of this is explored in detail in the later books, which maybe the author hasn’t read? If anything, Dune deeply affirms that society mirrors technology rather than creating a simple “naive feudal sci-fi” world as claimed here.
I haven’t read much past that yet since the article is very wordy, and it’s hard to be motivated to push forward once you stop being convinced that the author has a point.