You probably have your causal link backwards: mental illness creates homelessness and vulnerably housed situations.
The homelessness and vulnerably housed situations don't help people with a psychotic illness (contributing to medication non-compliance); and there is probably some situational depression there too.
But it's probably wrong to say that homelessness cuses schizophrenia.
https://en.wikipedia.org/wiki/Homelessness_and_mental_health...
Also, how did you manage to relate this at all to TFA?
"Also, how did you manage to relate this at all to TFA?"
Just what exactly do you think the real world implications of this attitude / policy are more generally?
"It’s terribly difficult to manage unmotivated people. Make your job easier and don’t."
He is saying: don't try to manage them. Fire them.