On the second point, I think it would be hard to find a book talking about mental health/healthcare that weren't challenged, but I could be wildly wrong on this. I just get the impression that there are many many takes on mental health, especially coming from a variety of fields—psychology, psychiatry, neuroscience, social work, sociology, criminology, etc.—and that I personally believe we still have a lot to learn in this space.
I agree the opinion is probably too sweeping, as I like to qualify most of my statements and some people, especially authors and politicians, often exaggerate theirs.
> Your comment reminds me of an episode of Joe Rogan with Johann Hari [1], talking about what really causes addiction and the failures of the "war on drugs."
I guess I'm a bit confused at such pushback on Hari, but maybe by putting "really" in my statement, with such confidence in the statement, I invited such a challenge.
[1] https://en.wikipedia.org/wiki/Johann_Hari#Plagiarism
[2] https://www.theguardian.com/science/brain-flapping/2018/jan/...