Re: Who here has Social Anxiety/Phobia or exhibit the symptms of it?
My take on the psychiatrists is that they have a difficult job - assessing mood, risk and response to treatment must be extremely subjective.
That said, I suspect it's no different from other branches of medicine - ie. pattern recognition. You make a diagnosis, treat it and then if things get better then you carry on. If they don't then you re-evaluate.
To some extent, I suppose it doesn't matter so much if you understand what's going on underneath as long as people get better.