Wedrifid only said "potential"; most people, smart or not, behave as you say. And I would expand "delusion" to 'belief": being smart is correlated with being influenced by beliefs, true or false.
That people act on beliefs or have at all coherent world-views is the most dangerous widespread delusion. ("The world is mad.") Immersing yourself in a crowd of average intelligence might help you see this, but I rather doubt that your associates act on their beliefs.
I rather doubt that your associates act on their beliefs.
Not on their stated beliefs; surely, but don't most people have a set of actual beliefs? Can't these actual beliefs, at least in some contexts, be nudged so as to influence the level and direction of cognitive dissonance, which in turn can influence actions?
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