>>5800180Your brain is a complex thing anon and it is impossible for us to fully grasp it, the neural networks which dictates our behaviours and whatnot are just too many.
Psychiatry is based on the assumptions that certain behaviours, feelings and thoughts are to be seen as deviant and can therefore be classified as diseases (in fact, nowadays there's a movement that pushes the whole "depression is a disease" concept very hard). There is no way to say that depression is a disease, I would hold it more likely that depression is in most cases a normal response to things that have happened in an individuals life, whether or not he or she is aware of it.
Psychiatric drugs works mostly as agonist or antagonists of various signal substances or neurotransmittors. They fit in to the receptors of said signal substance and either increase or decrease the signal. In reality very little is known to what this actually does, as it would trigger processes which would have no real reason to be triggered, how can this be a cure?