I'm reading this very interesting dystopian novel, but I came across a sentence I don't understand. In this dialogue between mother and daughter, set after a global economic crisis that has disrupted everyone's lives, the daughter tells her mother:
“Dad said it would never happen,” Emma says as we leave the detritus of the twin malls behind us and head north toward the airport toll road. “Chávez probably said the same thing. It’s what we do, honey.” Really, it’s what we don’t do. We don’t think anything will ever change.
I really don't get the meaning of "It's what we do", therefore I don't understand what "what we don't do" means in the following sentence. Can someone please paraphrase for me the dialogue, to make it more clear?