I'm not willing to categorically say those people were not suffering from major depression (who am I to judge), but it strikes me as the kind of fix that's not commonly going to help major depression, and to see it almost universally touted here as the cure-all is dismissive at best and counterproductive/condescending at worst. To me, it's not much better than saying "just smile more".

Thankfully it's not an issue for me anymore, but those "fixes" were total crap (for me) when it was.