I have monthly therapy sessions with a LCSW as part of my holistic health maintenance. I've always been an introspective person so I typically don't learn anything new about myself. However I find that having an echo chamber to bounce my thoughts off of is what I find comfort in.
These boards are the same way. If I'm so inclined I'll toss a thought out there just to get it out of my system. I appreciate any feedback but I probably won't learn anything I don't already know.
Re: relapse threads. Whenever I see a relapse/struggling thread I read it just to see the mindset of the person writing it. When you do this long enough you can more or less accurately predict who will be successful in sobriety or not. A recent example is a relapse after over a year of sobriety but that's ok because it was only one day.
Reading these stories reinforces in my mind to stay away from mindsets like that.