41% of the population will experience a diagnosable mental illness, and 26% have one in any given year. Clearly there is more to the issue than just blaming mental illness or there would be far more homeless people than there are right now.
Discovering what support structures work and making those more easily accessible seems like a great place for a disruptive start up, except that health care is so incredibly messed up no one wants to touch it with a ten foot poll.