I totally agree with you, but I would just like to add a little more to the story,To me, religions are just a foundation upon which people can carry on with life in societies. The foundation is formed by geological factors, climactic factors, etc. much like the actual physical and psychological makeups of the people. After all, religions are societies. Societies reflect the nature of the people in them.
Supernatural beings (mythical or otherwise) are simply parts of those societies and really don't have a bearing upon how well the societies work, but rather on how people perceive aspects of life.
as an atheist, I too, need to fit in to the society of life, in my way, and like
the believer feels secure and happy in his belief, I also feel those feelings
within myself as an atheist. In this life, we are just another facet of society,
who have found our niche, and go down our path in life, in a way which makes
us feel connected to the earth and it's surroundings, but not to a god, just
different choices for a good life.