Our brains also have evolved rewards for performing life-continuing behaviors, and then evolved to rewarding proxy behaviors, instead of the actual life-continuing behavior. This is perfectly in line with what you are saying, but now we are rewarded for spotting enemy snipers in CODBLOPS, rather than spotting lions/snakes/crocodiles.
We have gotten very good at hacking this reward function. It has reached a point where a thinking-minimization engine will pay a significant amount of resources to, say, Paradox Studios to do what is effectively the opposite of not thinking.