I would like to see an example of that. I dont remember a single time I found anything useful on reddit other than info copy pasted from some website that had actually usable UX.
https://old.reddit.com/r/UTV/comments/q9mqyo/looking_to_buy_...
https://old.reddit.com/r/UTV/comments/13li1iq/is_3500_lb_eno...
Frankly, I'm stunned you haven't had a single time where something useful came from a reddit discussion; sure, topical forums are usually better for very specific knowledge but for many cases it's great. And obviously you need to be able to sift through the bullshit but we deal with that already daily with Google results.
Found reviews of a couple of products and then chatted up someone who said a couple of days earlier was gonna test some of them. It feels like a community of people who care about stuff.
I think you're just bashing it for the sake of it.