Túrin's story is just one tragedy after another, the poor guy can't catch a break

It may be. I haven't read the studies that report this with enough attention to determine if it was 100% well realized or not, but the review article I cited seemed very interesting and comprehensive, citing several papers with different conclusions. Most of them appear to agree that there is a correlation between psychotic alterations and marijuana, but more research is definitely needed to fully understand the mechanisms and possible causality.

Several studies have linked marijuana consumption with the onset of schizophrenia and persistent psychotic symptoms. Some of these report that a frequent user of cannabis has 6 times higher probability of developing schizophrenia. This, however is neither a necessary or sufficient condition, there are other factors at play, some kind of genetic susceptibility being probably one of them.

Source

I think there's a difference between wanting to examine for yourself books that were "cancelled" to understand the causes of the controversy and if you agree with them, and building a world view entirely on bullshit. It depends on whether you only read these books or if you read other points of view too.