This is an old paper, but it got me thinking...
There are certain "positions" that are sometimes put forward by those working in health, psychiatry and related fields that seem to be really saying something, but when you reflect on them, they aren't really saying anything at all.
The biopsychosocial model - the idea that we should consider biological, psychological and social factors when explaining disease - sounds so sensible, doesn't it? But then when you think about it, nobody seriously holds the opposing position, do they? Nobody really goes around thinking that everything there is to know about diabetes can be learned by studying insulin reactivity and other physiological changes, and we should ignore everything else, do they? Of course the person's emotional response and social situation matters, and may have consequences for managing the disease. Nobody really thinks "oh, let's just study the one level, there's no need to look at anything else". Everyone realises that's just stupid.
So the opposing view to the biopsychosocial model is nothing more than a straw man.
Also, people who advocate ideas like BPS (and other similar ones, like "integrative pluralism") often caricature other people's approaches in order to make theirs look better. If a person decides to look at functional brain abnormalities in schizophrenia, they are accused of being "reductionistic", of blindly excluding the possibility that higher level factors might be relevant. Its a slur, no-one wants to be seen as doing that. But nobody really is, are they? Those researchers looking at neural factors in schizophrenia, are any of them really thinking that there's nothing to be added by studying the psychological level? More likely, they just think that the neural level might have a lot to tell us.
On the other hand, if you take the BPS idea at its word - that we should give all levels of description equal weight in our explanations of health problems - that's also stupid. Different levels of description will do different amounts of explanatory work depending upon the problem. So for something like Huntingdon's chorea, a genetic neurological disorder, there's not much causal stuff happening at the social or even the psychological level. The person can change their social situation, modify their thoughts and feelings, and none of it will make a sod of a difference to whether they end up with full-blown Huntingdon's chorea. Conversely, if you grew up in the favellas of Rio and ended up running errands for some drug lord - and got caught and sent to prison - no amount of medication or neurosurgery will "reform" you, because there's nothing wrong with your body or brain. Social factors are going to be doing most of the explanatory work here.