Until today I thought that non-disclosure was only justified in reference to our sinful condition. The psychologist doesn't disclose her patients' problems because sinful humans are likely to treat her patients wrongly if they know about the problems. And so on.
But I was mistaken. First, there are cases not referring to our present sinful condition but a potential future sinful condition. For instance, even an unfallen human can be swayed by temptation, as the story of the tree of knowledge of good and evil shows, and a person can be tempted by the disclosure of benefits.
Second, there are cases where it is good to fail to disclose information either because the order of disclosure is important or because because it is better that the information be discovered by someone on her own. This is an important part of sound pedagogy, and this does not seem to be an aspect of the Fall. God did not, as far as we know, disclose Pythagorean Theorem to Adam and Eve before the Fall, and it was better that humans discover it on their own.