I think he meant that there's a stigma associated with depression—that many of us unfortunately view depression as the "fault" of depressed individuals, as if it were some sort of choice they make.
No one would ever blame you for a [genetic] heart disorder. In the same way, no one would ever blame you for a [genetic] brain disorder. Phrasing it as such removes some of the stigma.
> I think that the way to beat the stigma is talk openly about it.
Easier to say than to do. If you're depressed / bipolar / schizophrenic and talk about it openly it can make people very uncomfortable, which can result in their not wanting to be around you, which can result in further isolation for you, which can make your situation worse.
No one would ever blame you for a [genetic] heart disorder. In the same way, no one would ever blame you for a [genetic] brain disorder. Phrasing it as such removes some of the stigma.