Sure but the point of research is to improve understanding. Today there is correlation, tomorrow we find causation.
Are you suggesting we should stop looking for a physical cause of depression? Many neurologists believe that psychological conditions map onto physical structural or chemical differences. Maybe that is the case, maybe that’s not the case but we use the tools we have to do that research so that we can better understand, and if necessary treat, these conditions.
I'd be very curious to see how causation may be found for most psychological conditions. I'm sure there are ways I haven't seen or considered, but it seems really difficult to structure a study that would lead towards potential causation.
Traumatic brain injuries are one standout, though even then I think its just correlative as no one is going to attempt a study that intentionally causes TBIs in the test group.
Are you suggesting we should stop looking for a physical cause of depression? Many neurologists believe that psychological conditions map onto physical structural or chemical differences. Maybe that is the case, maybe that’s not the case but we use the tools we have to do that research so that we can better understand, and if necessary treat, these conditions.