It's most noticeable when the topic being discussed is your area of expertise. Then you clearly see what kind of grossly oversimplified or even blatantly false comments get made with so much confidence and upvoted.
I tried to keep this in mind while reading stuff that I'm not an expert in, but that's hard.
I won't say this is definitely not true, but it has a lot of "my dad works at Nintendo" vibes.