Every once in a while I'll come across threads like this on HN where most posters make enormous assumptions, are confidently incorrect, or refuse to be even sli

Every once in a while I'll come across threads like this on HN where most posters make enormous assumptions, are confidently incorrect, or refuse to be even slightly open-minded, and it makes me lose faith in this place. It comes off as a red flag, indicative of the rest of the site. There's a relevant Reddit quote that I don't have access to at the moment, but it goes something like this: "I'm an expert on X topic. I've seen people talking about my subject of expertise with extreme inaccuracy many times before and its irritating... Immediately afterwards I'll move into another thread and will forget everything I just witnessed and will take reasonably convincing posts as factual (Even though they're of the exact same nature as the post that was entirely wrong but was reasonable and convincing enough that it got hundreds of upvotes)."