... the legal system and laws regarding the disclosure of mental health conditions to third parties.
Hawthorn never announced Thompson's depression, assuming they knew of it, because they were legally precluded from doing so. He announced it publicly, as he was within his rights to, and it didn't scare North off one iota. Hawthorn was no more able to announce Hay's condition (assuming they knew of it), and he didn't choose to go public with it until the wheels had fallen off at North (and that was also his right to announce, or not announce, as he saw fit).