I think you, perhaps, miss the ideal target audience of this post. What Yvain presents here is in effect a counterargument against people who argue that religion isn’t all that bad, even if it’s false, because of the other benefits it gives people. Anyone who is reduced to defending religion on these grounds is likely not a typical theist.
This isn’t an argument against theism, it’s “opiate of the masses” vs. “just say no to drugs”.
And the first action of any Friendly AI will be to create a nonprofit institute to develop a rigorous theory of Eliezer Yudkowsky. Unfortunately, it will turn out to be an intractable problem.