While agreeing with the OP's idea that everybody's screwed up in their own way, I'd disagree that most people are diagnosable as such. To be diagnosable, you have to be messed up to the point where your quirks are interfering with your life in a serious way. If you're happy, functional, and stay out of trouble, you get the psych thumbs up.
I don't think any informed person could dispute that Scientology's caused many a case of PTSD, so I'll just acknowledge that and move on.
Scientology can also cause delusions by bombarding people with false data and forbidding them from hearing differing points of view. Delusion due to bad data is an enormous social problem, but hard to deal with, since freedom's not always compatible with official versions of truth.
I do think there's something else which should be looked at in addition to the above: I wonder about some old friends of mine who had extended psychotic episodes while on, or shortly after finishing, OT levels. IIRC, Ron Hubbard's explanation of schizophrenia was that it meant multiple personalities. This is incorrect, dissociative identity disorder (that's the correct name) is different and far rarer. Very few cases were observed before the 1970s, and the disorder remains quite rare outside of North America.
The odd demographics involved drew the attention of researchers. Why the increase of cases, and why mostly limited to North America? Although it's still being debated, one side has made a pretty good argument that the disorder is iatrogenic in origin, meaning it's something induced by attempts at psychotherapy gone wrong. The risk seems tied to factors like use of hypnosis, reliving incidents, and attempting to contact different personalities within the self. It is most common and most severe in patients who are suggestible and easily hypnotized.
My friends who went off the deep end -- was that how? I don't have enough data to objectively evaluate their cases, but if current thinking about dissociative identity disorder is correct, Dianetics, Scientology, and OT III in particular, might be the perfect medium for bringing about mental illness in a certain percentage of practitioners.
Thoughts about the OP and your post ... I don't think all people are arrogant, but in the culture where I live (US), we've been heavily exposed to the promise of perfection, and at minimum, directions on how to be
more perfect. I think most people understand this, so I'll skip the details.
What mental/psychological issues can we attribute to scientology? Obviously, I'm just doing a combination of speculating and reporting.
I think the year was 2009, and I decided that I wanted to produce a small speaking tour, of well known exes/whistle-blowers. I had selected the Pacific Northwest, as one of the first exes I contacted was really excited about the idea, and said not only they'd do it for no fee, but suggested that it happen annually. They lived in the Oregon area, and he told me of all the Colleges and Universities I should contact.
I called a wonderful, warm, open, generous and lovely man named Chuck next. We ended up talking on the phone for over an hour, and eventually got on to OT 3. He said something like: it was really exciting at the time, like this wild science fiction rodeo! Then he told me something that at the time, I'd never heard before - but have since. He said something like: "Scientology fucked me up bad, and I think that I'll probably never get over it." My heart sunk.
I think it's so, that people can often know the source of their mental condition. Genetics, trauma of war, being beaten as a child, and so on. The good news is, that it tells us where we want to start in the recovery process. Sometimes, like the illusive perfection we may want to seek out in various ways, recovery may be successful or may be less than perfect. Or a flop. That's life.
I wish Chuck and everyone a good and speedy recovery. Chuck is such a sweetie, I wouldn't be surprised if he was fine now.
Does the greatest good mindset disappear quickly after leaving?
