Is Normalcy Bias + Cognitive Dissonance Part of the New Normal?

Is Normalcy Bias + Cognitive Dissonance Part of the New Normal?

Something really big and nasty just happened. Should I underreact or overreact? Should I pretend that nothing lasting happened and that things will soon return to normal (normalcy bias), or should I make major changes even though I am not yet sure that these are needed or wise (cognitive dissonance)? Let’s ask our neighborhood psychologist.