Earlier quoted context omitted.
what if they complain about it chronically? are you then justified to offer unsolicited advice, or do you have to just listen (i.e. be their outlet)?
I think that's a very good question. I'll give an anecdote from group therapy. There was one member of my group who was having a difficult time motivating himself to make a particular change he wanted to make. I had long since learned the dangers of "advice giving", so really just asked why he felt it was so hard to make that change. He definitely had a lot of backstory that could explain his underlying fear. However…
You weren't "just"-ing him -- you knew the intricacies of his situation, and it's a lot easier for someone to take advice to heart if they can trust that you actually know the context.