So, basically be rich enough to not work?

There is probably some true to this advice, but the issue is not that it's some hidden secret, it's that fact that is basically infeasible for a majority of people.

Trust me, while I benefit from psychiatry, I am by no means a fan of psychiatry as a whole. However, your comment only focuses on depression. There are plenty other disorders that psychiatry deals with, like Schizophrenia, that the list of advice above would hardly make a dent in for many.