You’re describing situational depression. A lot of people have chronic depression, where he only hope for managing the depression involves pharmaceuticals.
As someone who used to suffer from chronic depression, that's simply not true. Treatment is difficult, and pills are the easiest solution, but claiming they're the "only hope" is bordering on industry propaganda.
33% success rate on first try is better than I'd expected.
Anecdotally, I've heard it usually takes several tries to find an antidepressant that works for any given patient. But once you've found a drug that works, that helps a lot.
Which is completely irrelevant in many cases. Depression can be caused by serotonin deficiencies, and once you’ve got depressed (pun intended) values, it’s difficult to return to baseline without medical support.