There appear to be two threads on a very similar theme, so I have copied and pasted what I have said elsewhere.
"I just feel that someone new, and distraught, might be grateful to know where to go to discuss their problems, rather than, say, an existing, long thread which could be seen as a closed shop, into which they might not feel they could intrude. It's not a question of isolating unhappy people, but being a bit sensitive to their needs and their sadness.
And those of us who are fortunate enough not to be in that position, might feel less constrained in offering our help, or even just our shoulders to lean on."