Tangential, but it's strange to me the sort of culture that Quora has cultivated over the years. It seems to tolerate and even encourage low quality content and contributors to the point that ignorance, misinformation and poorly researched opinionated answers thrive on a regular basis. That's not to say there aren't good contributors and content, but browse any one random topic today and you'll be forgiven for thinking you are on Yahoo Answers. Just no filter at all, extremely poor questions, offtopic comments posted as answers, people with no understanding of the subject shamelessly pretending to know what they are talking about, etc etc.
It's just all around incredibly unpleasant. I loved Quora in its early years when it was invitation only, but I don't ever want to have anything to do with it again.
I browse Quora quite a lot, but I only follow writers I like, and no topics, to avoid exactly this. The average answer quality is dreadful.
I think the point about shamelessly pretending to understand, though, is a subtler question, and difficult to address. I follow people on a lot of topics I don't know about, and I've occasionally discovered later down the line than they're full of crap. And I realise in retrospect that I've helped them do it, upvoting seemingly well-researched answers because I appreciated the effort.
It really highlights the difficulty of figuring out who to trust when there's no central authority, and I could see myself being drawn into some reality-denying group a la flat-earthers or antivaxxers just because I happened to follow the wrong people at the start, and on their advice reject other answers.
It's just all around incredibly unpleasant. I loved Quora in its early years when it was invitation only, but I don't ever want to have anything to do with it again.