As another notable example of dath ilan hiding information for the alleged greater good, in Golarion, Keltham discovers that he's a sexual sadist, and deduces that Civilization has deliberately prevented him from realizing this, because there aren't enough corresponding masochists to go around in dath ilan. Having concepts for "sadism" and "masochism" as variations in human psychology would make sadists like Keltham sad about the desirable sexual experiences they'll never get to have, so Civilization arranges for them to _not be exposed to knowledge that would make them sad, because it would make them sad_ (!!).
It did not escape my notice that when "rationalist" authorities _in real life_ considered public knowledge of some paraphilia to be an infohazard (ostensibly for the benefit of people with that paraphilia), I _didn't take it lying down_.
As another notable example of dath ilan hiding information for the alleged greater good, in Golarion, Keltham discovers that he's a sexual sadist, and deduces that Civilization has deliberately prevented him from realizing this, because there aren't enough corresponding masochists to go around in dath ilan. Having concepts for "sadism" and "masochism" as variations in human psychology would make sadists like Keltham sad about the desirable sexual experiences they'll never get to have, so Civilization arranges for them to _not be exposed to knowledge that would make them sad, because it would make them sad_ (!!).
It did not escape my notice that when "rationalist" authorities _in real life_ considered public knowledge of some paraphilia to be an infohazard (ostensibly for the benefit of people with that paraphilia), I _didn't take it lying down_.