That wasn't the question I answered.

But it was the question I asked, in context. The "mere fact" referred to in my question was the existence of religious people -- it was not an abstract question to be applied to any random "mere fact".

No it doesn't, that's absurd.

Right -- because that's exactly what happens when you take a point out of context, treat it as an abstraction, and then reapply it to some other specific fact than the one it was relevant to.

If unhappiness was a strictly detrimental phenonemon then we would not have evolved to experience it in such depth.

Detrimental to whom, relative to what purpose? Evolution doesn't have our personal goals or fulfillment in mind -- just reproductive success. It's merely a happy accident that some of the characteristics useful for one, are also useful for the other.