Rather than the mushrooms causing your depression, they may have exposed it, allowing you to continue to develop and be aware of parts of your experience that you'd previously not been able to feel. That you went through that, came out of it, and now feel whole, sounds like a wonderful thing.
Fagsworth is correct in a semantic sense, however there needs to be respect of the process of healing.
It isn't a magic bullet, where you take them, have a trip, and are suddenly a different human being.
This can, and certainly does, happen.
However, psychedelic experiences leading to profound introspection can sometimes exacerbate the symptoms. The ego, when exposed, is a very sensitive construct and can sometimes take a while to re-establish itself.
An example: You are a nice, caring person... But you can be a supremely arrogant jerk on occasion. You take mushrooms, and have an hour of uncomfortable dissonance on the negative effects of your arrogance.
You discover a new way to look at yourself, that completely alters your outlook on yourself as a human partaking in the human experience. But, this hurts a little because you feel ashamed and embarrassed.
This isn't something that may help you somersault out of bed the next day, but once you understand what you learned you may find yourself being more compassionate in the long run.
The difference between "causing" and "exposing" doesn't seem very meaningful or scientific. I often see people make the same claim of these drugs when they cause psychosis or schizophrenia, but it sounds more like a defense of the drug than anything else.
What we want, for understandable reasons, is a predictable way to just make ourselves happier, smarter, and more effective.
Psychedelics seem to be able to do that for some people, but not for others, and the effect overall seems like it has this "journey" component as well as a hefty dose of non-determinism.
I suspect that the thing we really don't like about that is what it says about self-improvement.
What if there isn't a neat, linear, deterministic path from "worse" to "better?" What if it always takes some kind of winding journey, whether involving psychedelics or not? What if there is no happy pill, or at least not one whose brand of happiness we would really want?
Why do you think this can cause schizophrenia? Are you trying to suggest a psychosis can temporarily produce similar symptoms, or that there is fundamental damage to the brain resulting in long term disease? These are massively different claims.
