It's a valid remark on how companies do tend to treat their workers as little more than livestock. While it is denunciatory, the subject deserves denunciation.
Many things deserve denunciation—so many that if HN is to host denunciatory rhetoric about all of them, that will soon become the theme of the site. We don't want that, because this site already has a theme: intellectual curiosity, which can't coexist with denunciation.
I disagree both with the premise that denuncing realities of the industry that go unnoticed in a relevant context prevents intellectual curiosity (I believe that as long as it isn't a bandwagon, it actually triggers interesting discussion), and I disagree with the slippery slope argument you present, as it seems quite unfounded.
https://news.ycombinator.com/newsguidelines.html