I do agree with preventative measures, and there are some that can be taken, but this includes things like regular psychological screenings and physicals since some mental illnesses have biological markers: teaching people warning signs: teaching coping skills early on and making sure medication and real help are available to those that need it. A society with some empathy helps as well. But those are a long long way off and I'm not sure of the effectiveness of such things as a preventative measure: these might simply be a tool to catch mental illness early. Still positive but hardly preventative.
And the stress bit is a little misleading. My exhusband had schizophrenia and was on disability for it. Some days, it was ok. I worked, he did stuff around the house and took care of the dogs. Some days, the stress of having to shower was too much. It was impossible to eliminate the stress enough since so much of it was misreactions to very low stress levels. Unmedicated, it was all he could do to get the voices to give him mental peace - this led him to a suicide attempt. luckily, after that he always had the option to check himself into the hospital and go somewhere safe if it got to much for him (and I had the option to call and get him there if needed). Medicated, the voices were less, but didn't go away. He took his medication out of fear of things most of the time (most... ).
"Some days, the stress of having to shower was too much. It was impossible to eliminate the stress enough since so much of it was misreactions to very low stress levels."
That's sad.