So I had a thought. This isn't to derail Apos' point, but I was reminded that this thread exists.
We have another thread on this board that is focused entirely on venting outside of the rules and confines of the context of what we're venting about.
This one. Here's an example of venting for the sake of venting, and sometimes even swearing and insulting in a not at all friendly manner. And it's still mostly constructive. Why? Because there is no to almost no chance that anyone who is being vented at or about will see it. We don't have to tell people to not vent about people on these boards or in this hobby, even if they are driving us insane in an RL manner. The limits of that thread are understood almost universally without extra rules being enacted.
And yet I don't for a second doubt that it's not useful. We get things off our chest to fellows who either commiserate or ignore it if they disagree. Even shouting into the void is considered healthy, in moderation.
There is no stated conclusion here, but in my mind it's a lynchpin of many of these related comments.