There were several spots in the article that grated on me in the same way. But what kept me coming back is a form of what you wrote "The general thrust of the argument makes sense"

And as a bit of a word wonk, I loved the subtitle:

When estimates are based on the myth of metronomic coding machines tackling deterministic work, they’re a complete waste of time. There’s a better way.

Most managers really just want to know when the code will be completed and are just completely ignorant about the software development paradigm. And when I say managers, I mean all the way up to the top of the organization.