It all seems a bit fishy to me. I mean, if everyone is getting depressive episodes, I can't help but think:
1. It's an episode, so that means it passes
2. So many people get them, they should be considered normal.
Of course people get depressed--we all go through tough times. Sometimes life sucks--your kid dies, you get divorced, you get fired, whatever. You get through it. And when you do, you realize that you can make it through a tough time, so you remember that next time. I wonder if giving people pills to get through these times actually shortchanges them by taking this experience and confidence away from them.