While I respect your opinion I have to disagree with you. There are studies that show, without
a doubt, which receptors are activated by any specific medication
. It's true that serotonin being the cause of depression and/or anxiety is just a theory. Another theory is a deficiency of norepinephrine and dopamine. Some people respond to SSRI's, some to SNRI's and some to NDRI's. Some people, like me, typically only respond to a combo of an SSRI and an SNRI.