From a brief review of Peter Kramer's Against Depression (2005):
Consumption (tuberculosis) was viewed as a somewhat fashionable disease, a sign of an artistic and intellectual nature. (It was probably viewed that way by artists who contracted it; the greater "unwashed masses" who also were afflicted with the disease had no such pretensions.) Of course, tuberculosis eventually succumbed to medicine and fell out of fashion. (It is still a problem in communities underserved with health care.) To a certain extent, depression has some of that cachet attributed to consumption by earlier generations, but Dr. Kramer thinks that depression will eventually go the way of tuberculosis and be cured with medicine.
I've suffered from severe, treatment-resistant, unipolar depression for over 25 years. I respect those who are able to pull themselves up by their bootstraps and don't let depression define their lives, but there are a lot of us who are not that strong, for whatever reason, and for whom depression majorly colors our lives.