"Biologists discover the evolutionary roots of food!"
In the second case, we uncontroversially see that food meets a need integral to vital human nature. In the first case, we see a similar instance of integral satisfaction. If God is an illusion generated by natural selection, then so is caloric consumption. In the order of analogy, God meets a need integral to human nature, just as everyday food does. Just as the need for food is integral to grasping the evolution of humans up to this point as metabolizers, so the need for God is integral to grasping the emergence of human beings as worshipers.
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Only brains that responded to the objective fact that 2 objects combined with 2 objects make 4 objects were selected for by prior selection pressures and reproductive opportunities. It takes special effort to overcome that mathematical illusion with the advanced powers of abstraction. We all 'know' that 2 things placed adjacent to 2 other things still only make for a pair of two arbitrarily juxtaposed objects.
Only brains that responded to the objective fact that God exists were selected for by prior selection pressures and reproductive opportunity. It takes special effort to overcome that illusion with the advanced powers of abstraction. We all 'know' that theology is just a hyped-up version of the natural cognitive assumption that agents lie behind motion and order.
If natural selection doesn't consistently and profoundly yield truth-bearing cognitive apparati, why look to it for a consistent and fundamental explanation of truth as we perceive it?