Yes, but to know "why" (I'd much rather say "how") current drugs work you don't need to know "why" people get certain illnesses - that's my issue with the artic

Yes, but to know "why" (I'd much rather say "how") current drugs work you don't need to know "why" people get certain illnesses - that's my issue with the article. Their logic is: low serotonin levels aren't the cause of depression - so raising serotonin levels will not eliminate the cause of depression - so doing that isn't useful. That's a naive (and wrong) logic. Your heart going into fibrillation is not the cause of your heart problems, but treating the fibrillation can save your life - whatever the "cause" of that fibrillation.