We're certainly not born omniscient, so of course if we want to learn something, we can go to those who've mastered the subject. There are many models of how a person should live. If a mentally ill or unhappy person prefers one of those models, he or she can seek out the best books or representatives of that model. We should be free to learn and to improve ourselves as much as we're able to.

But the question is the source of that preference. Is this unhappy or antisocial person conforming to social norms out of fear of being herself? Is society dictating the preference and the mold into which we're supposed to fit? Is it better to be happy as the self that has to deny her upbringing, experience, talents, and potential or to be unhappy as the self that reflects who she really is because that type of self doesn't fit into that culture?

In other words, which is worse, the unhappy self or the society into which that self doesn't fit? If that society is flourishing and the unhappy or mentally disordered person can learn some elementary lessons on how to improve herself, fine. But if that society is hypocritical, tribal, and destroying the planet, I'd think twice about deferring to it for advice on morality, ethics, or self-improvement.