I guess my argument is that when people can't see an immediate utility for the truth, they can become lazy or rationalise that a self-deception is acceptable. This occurs because truth is seen as useful rather than essential or at least essential in all but the most extreme circumstances. I think this approach is present in the "truth isn't everything" interpretation of instrumental rationality. The systematised winning isn't intended to comprise this kind of interpretation, but I think the words it uses evokes too much that's tied into a problematic engagement with the truth. That's where I currently sit on the topic in any case.