The context is specifically about online sites like HN and the well known phenomenon where the technical usefulness of the site is inversely proportional to how many participants are trying to bring their preferred politics into it.
If you are able to have productive discussions about tech & politics with your coworkers, that might be because you are exceptional humans, or because you were in person rather than online, or because you already shared your co-workers political opinions. None of those apply to an online space like HN.