Sillylass - I see what you are saying about brain chemistry, and I know I mentioned it in my (mammoth) post this morning, so apologies for mentioning an outdated theory.
I don't want that to detract from the main point I was trying to make, though - that depression isn't just a weak response to some bad things happening (prompted by the poster who said she had a lot of tragedy in her life, but hadn't given in and stopped working, because you just have to get on with things - or words to that effect).
I struggle to explain why bullying that happened over 30 years ago still affects me so badly, in such an all-pervading way - and the brain chemistry theory made sense to me, in that I thought, OK, I have a particular chemical imbalance, that makes me more prone to depression, secondary to my lack of self esteem, and in turn, makes it nigh impossible to defeat that lack of self esteem.
For me, it explained why some people are more prone to depression than others - an explanation that didn't make out that people with depression are just weaker than other people, so can't just cheer up and get over it.
What resonated most for me, in your post, was when you said, "The truth is the number of people whose depression is intractable enough to keep them out of work for long periods shouldn't be that high. It is not true for the vast majority that there is no long term recovery possible.
Services and effective treatments for significant depression are very poor for many which is a disgrace. For the overwhelming majority good therapy and the right medication should put a stop to depression."
That is so true.
I don't necessarily agree that people are buying into depression as a disability or a life-long, intractable illness. I think my depression severely limits my abilities when it is bad, and I suspect that I will always have a higher than normal predisposition to developing further bouts of depression - BUT with the right treatment and therapy, I ought to be able to stay out of the black pit and should recover the abilities that are lost at the moment (the ability to like myself, to look after myself - especially my weight, and the ability to do things around the house that need doing). And whilst I might always be at a higher risk of developing depression, the right treatment should enable me to stave it off when it arises.
So I suppose I do see it as lifelong, but it needn't be intractable. The sad thing is that the right therapies exist, but most people can't access them. I realise how lucky I am that dh has health insurance through work that covers me, and allows me to get 1-to-1 therapy now, when I need it. MH provision in my area is much better than in many others - I did get 2.5 years of group therapy for free - but I didn't start that for at least a year and a half after seeing my GP here for the first time (for a represcription of the ADs) after we moved up to Scotland. I was on the waiting list for a place in a therapy group for over a year.