Reddit has always had the dynamic of people misrepresenting their knowledge and just repeating what other people said on that subreddit. I find myself doing that when I spend too long on there - posting very authoritatively on something I'm honestly clueless about.

One big pet peeve of mine on reddit is on any kind of immigration-related subreddit it is absolutely filled with people talking about how it's impossible to migrate and you'll never get a visa. Yet, meanwhile, people do migrate successfully and legally all the time.