You are partially right... but depression is about attitude too. I think that now too much "it's not your fault, it's a disease" is being spouted and some people use their illness as get out of everything free card.

I believe that depression is more spiritual than medical and often it can be helped by merely fixing the problem in your life and learning coping skill and new outlook. The strict medical model sets people from disappointment when they realize that medical treatment will not make them likable, hardworking, smart, outgoing and determined people they think they would be.

while the "cheer up" advice is too simplified and harmful, the "nothing with attitude, everything is chemical" approach is just as hurtful. It's more complex. Much much more.