Hey,
This could be a topic in its own right. No I don't think psychedelics will 'cure' depression, which is why I tend to say treat it instead :D . The interesting thing with psychedelics is that the positive clinical effects are sometimes only present when the patients actively strive towards positive clinical goals. Our current medical standards aren't particularly compatible with such notions because we generally expect our medicines to work regardless of whether people want it or not. So I think the general question is, can mental problems be cured in general? To what extent is a mental 'problem' a part of ones very personality? Is there a necessary amount of suffering?
These are all issues on account of which I wouldn't proclaim mental cures in the same sense I would call somthing a cure for cancer. But there are people who are resistent to all other forms of treatment and for these individuals I think psychedelics would bring the greatest benefit. So I agree with you, I wouldn't want to promote any miracle cures, but I do believe in opening therapeutic windows :D .