There are also other reasons why ignorance can help as an entire research field about deliberate ignorance. For instance, would you like to know when you die? Some people want, but 90% don't. More is always better, is an illusion. It's better when you are in a situation where the past is like the future and the future like the past.
Psychologist and author Gerd Gigerenzer of the Max Planck Institute for Human Development talks about his book Gut Feelings with EconTalk host Russ Roberts. Gigerenzer argues for the power of simple heuristics--rules of thumb--over more complex models when making real-world decisions. He argues that many results in behavioral economics that appear irrational can be understood as sensible ways of coping with complexity.