yytz: All I know is what the OP said (I admit that that’s obviously incomplete), but there’s a big jump from “hisbodedus, increasing one’s emuna, getting more sleep and exercise, eating healthier food including dark chocolate, [and] increasing social contact” to “one can daven to Hashem and have the emmunah to rise past the yetzer hara of depression and never have to take a single drug such as an anti-depressant.”
Even if that’s not the way he said it (and for all I know it may not be) if the details of the first post are correct, then one major difference is in the way you treat depression. Your post, which makes a lot of sense, still treats depression as an illness or biological fact for which there are many non-chemical, non-psychiatric cures- the OP treats depression as a yetzer hara. Even if depression were solely psychological, treating it as a yetzer hara is probably not the way to go. A yetzer hara usually connotes a feeling or inclination that you are not supposed to have and that you must sublimate- a potential mental illness needs to be treated with support, not just “oh, I shouldn’t have this feeling, I must not be having enough emuna.” Calling it a yetzer hara makes it seem like it’s the fault of the sufferer, which your post does not indicate.