previous post), it seems obvious to most people that mental illness is due to brain disease. Critical psychiatry doesn't stand a chance! It must be wrong to question this assumption. But, of course, critical psychiatry isn't saying that mind and brain are separate (see previous post). What it is saying is that minds are enabled but not reducible to brains. It's got the weight of philosophy behind it.
Furthermore, it is also saying that the assumption that mental illness is due to brain disease is not based on logic, but rather on faith, desire and wish fulfilment. As I've also said before (see previous post), psychiatry is more like a religion than a science. It's much simpler to believe that brain pathology is the basis for mental illness and that its nature and cause will eventually be discovered. Believing this can be a way of justifying psychiatric treatment.
Actually, there's no need to justify treatment in this way. Mental health problems exist and professional expertise may be beneficial in treatment. The problem is that objectifying people through reducing their problems to brain disease may make psychiatry part of the problem rather than necessarily the solution to these problems.