Too many doctors are informed about depression (and other mental illnesses) less than me and you.
I'm telling you, if I knew that doing something that I doon't feel like doing would HEAL depression... I would jump readily into fire. I'm sure you would too. I would gladly chop my arm off. The problem is that I may LOOK not depressed for a while, but actually suffering intrenally, and then just be as depressed as before. Possibly even more.
One should only accept opinions from experienced psychiatrists.