The author didn't put any effort into actually trying to articulate a concrete example of a system that was already well-architectured but also needed section h

The author didn't put any effort into actually trying to articulate a concrete example of a system that was already well-architectured but also needed section headers. All of the examples they brought up would be better-served by more sensible refactors that didn't go to one extreme (4 line files) or the other (2000 line files). I'm sure there are rare files where having section header comments really is helpful, but personally I've never found it a useful way to organize my code, even in >500k LoC projects.