It's a little brash to dismiss published evidence as a conspiracy theory. You may think it flawed but then please at least make an intelligent criticism.

Who gets to decide what is "feeling sad" with a cause and what is idiopathic "chemical malfunction". Care to offer any references? Objective diagnostics?

I included the bit about antidepressants to caution swallowing the prevailing medical model hook line and sinker with out pause for thought as to it's assumptions. Pretty sure that's on topic.