And did you bother to read the Lane County 2016 Annual Homeless Point in Time Count I gave you the link to? Of the 1451 homeless people counted:

434 people have a mental illness 
232 people have chronic alcohol/substance abuse issues 

For a total of 666 mentally ill or drug use, which equals 46 percent of the total. Even that is misleading for a couple of reasons:

1. There is a lot of overlap. The mentally ill use mood altering drugs to self-medicate. Homeless people use them to dull the pain and stay awake at night.

2. Both mental illness and drug use are often effects rather than causes of living in a hostile environment. Being homeless is a very hostile environment. At the very least it makes mental illness and drug use worse. Experience in other cities using a "housing first" approach has shown that people get better when they have shelter, such as a subsidized apartment.

But that doesn't fit into the smug self-justifying story you constantly tell.