As I said, personal experience, but I have had to deal with probably a dozen people who have suffered VERY badly with mental health, and been very close to three. They have been, without exception, some of the brightest people I have known.
Just an observation :shrug:
Interestingly, and this is only from my own experience of my family/friends/associates/employees etc
Very Bright people tend to look at themselves for reasons their lives aren't great and this is where I have experienced people struggling with mental health.
Very stupid people look to blame...