History - What are specific examples of when a lack of knowledge can be or was beneficial?

... (Historical event, psych clinical case, pop culture)I am looking for specific examples like an actual historical event where a lack of knowledge

... (Historical event, psych clinical case, pop culture)

I am looking for specific examples like an actual historical event where a lack of knowledge or ignorance was beneficial to the outcome. Or perhaps when a royal met there spouse when posing as a commoner so the other person treated them normal? Specific Psychological case when not knowing something helped a person cope? Thank you!

or:... (Historical event, psych clinical case, pop culture)I am looking for specific examples like an actual historical event where a lack of knowledge or ignorance was beneficial to the outcome. Or perhaps when a royal met there spouse when posing as a commoner so the other person treated them normal? Specific Psychological case when not knowing something helped a person cope? Thank you!

Tags:knowledge,