The specific context seems almost like a distraction; there is a fundamental issue being raised here. Is there such a thing as a prosocial repeated lie? The existence of a known, obvious and unchangeable inconsistency in the social fabric can paralyse the ability of people to find the truth using logic and reason.
Which isn't to say that the discourse has to be logically consistent - it isn't ever going to be. But it should be open to challenges from a logical basis. One of the strengths of western society is that persistently asking "why are we doing [X] it doesn't make sense?" or repeating "there is evidence that approach [Y] gets better results" has often resulted in change. Compared to somewhere like the USSR where the system collapsed before it let people just go out and make their own lives better.
Which isn't to say that the discourse has to be logically consistent - it isn't ever going to be. But it should be open to challenges from a logical basis. One of the strengths of western society is that persistently asking "why are we doing [X] it doesn't make sense?" or repeating "there is evidence that approach [Y] gets better results" has often resulted in change. Compared to somewhere like the USSR where the system collapsed before it let people just go out and make their own lives better.