People say things like that because they don't know any better. You have to feel sorry for them really, they are ignorant. They can't understand how others struggle and so they reach for conspiricy theories. There is actually lots of positive and informative information out there regarding mental health and I think that there are more people who are understanding and interested in learning more than there are clods who wrote that letter to the editor. Folks write such letters because thats the only way they can get anyone's attention.

A person like that doesn't have any first hand knowledge of what it is like to have a relative, close friend or even themselves suffer from depression and so what do they know. If they had first hand experience then they would never even think it was something made up so drug companies could sell drugs.