While I generally agree, I know two people closely who SSRIs have really worked for. Not Zoloft specifically, but before them, these people were very depressed, relatively non-functioning, and one was suicidal. For them, they found an SSRI that seemed, to me, to make them normal, happy people. On the other hand I have a friend for whom all SSRIs he's tried have made him feel even worse, and that's saying something because he's been struggling with major depressive disorder since he was 15. And then there was the case of my ex's cousin which I described above that really creeps me out.
I think SSRIs are handed out way too freely and haphazardly, and doctors are given kickbacks for prescribing them, and it's fucked up. They seem like a crapshoot, but they do seem to work for some people. Check out Erowid reports, there's the whole spectrum of reported effects. I would say, however, that one should only approach SSRIs if other avenues have been exhausted... too often I hear about people going to the doctor like, hey, I've been feeling depressed, and they just instantly hand out a prescription. When maybe all you needed was to realize that some aspect of your life isn't working for you and that's why you're depressed. For example, I was horribly depressed for quite some time, but it was because I was in a shitty marriage and felt that there was no way out. Once I got out of that, my life started to be awesome again.
Anyway just trying to offer a broader perspective.