Be careful what you wish for. Humans are made out of biases. We enjoy roller-coasters because of the “irrational” fear they give us. We enjoy watching zombie movies because zombies are scary, when actually they are fictional entities, which, if they existed, would be less dangerous than a lot of “normal” humans or many real diseases.
Watching movies or riding roller-coasters could be seen as “irrational” in and of itself, just like playing the lottery. But what is left of human values if you get rid of all this?