Depression is a disease just as cancer, the flu, etc. He lived in a time without MAOI's, tricyclics, etc and depression was known to be treated by inserting an icepick in the frontal lobe of the brain.......I'd drink and whore at will facing that dilema.
Arguably alcoholism could be a disease as well and most certainly both have a genetic component in their predisposition.
Some of us can't help what we are handed.....

And Revs. Jim Baker and Jimmy Swaggart had both in spades...not to mention poor taste.