To a degree, it is useful to value truth over happiness in each of the occupations you mention. But humans have the ability to restrict their critical analysis to certain domains. Allow me to rewrite my comment:
As a firm atheist, I am fully open to the possibility that much of the world should stay religious, unless they're doing some sort of important work that's tangentially related to the question of God's existence (like studying humanity's origins), or they are doing some sort of work that requires them to make sure they don't compartmentalize their critical analysis.
At tonight's Thanksgiving, Erin remarked on how this was her first real Thanksgiving dinner away from her family, and that it was an odd feeling to just sit down and eat without any prayer beforehand. (Yes, she's a solid atheist in no danger whatsoever, thank you for asking.)
And as she said this, it reminded me of how wrong it is to give gratitude to God for blessings that actually come from our fellow human beings putting in a great deal of work.
So I at once put my hands together and said,
"Dear Global Economy, we thank thee for thy economies of scale, thy professional specialization, and thy international networks of trade under Ricardo's Law of Comparative Advantage, without which we would all starve to death while trying to assemble the ingredients for such a dinner as this. Amen."