Sometimes mental issues are purely genetic but often they can also arise from or be exacerbated by trauma. And homelessness sure is traumatic.
You've got a good point. These leaves are really starting to pile up, and the snow will be upon us soon. I think I'll just say fuck it and sleep under a bridge, and leave the grounds keeping to the parks department.
You did set up a straw man solely to get knocked down, right? In actuality, the idea of giving "housing to everyone" doesn't mean an idyllic single family stick-and-drywall dwelling with a yard, but rather something communal - like a less-populous more-dignified shelter with a modicum of persistent personal space. The maintenance would be institutional, and come out of the same operating budget as administration, utilities, etc.
I feel like most of the "some homeless just want to be homeless" argument revolves around baking in assumptions that public housing should come with a bunch of strings attached, to make the residents' lives "better". In your comment, this is the responsibility for maintenance or mental health treatment. Such conditions are what turns people off, not some intrinsic love for sleeping rough.
Most homeless people do not have a severe mental illness (around 70%) [1]. For most homeless people, it's primarily an issue of housing affordability. The solution is to reduce the cost of housing.
For the people who need more support -- due to mental illness or otherwise -- the affordable, effective solution is permanent supportive housing [2].
[1] https://www.treatmentadvocacycenter.org/evidence-and-researc...
[2] https://www.coalitionforthehomeless.org/proven-solutions/
“70% were receiving mental health treatment or had in the past.” "An April 2016 survey of New York City’s homeless population reported that unsheltered homeless individuals were most likely to be severely mentally ill single males." Something like 1 in 5 of the homeless in San Francisco have a traumatic brain injury.
None of these people are going to be fixed with mere "housing".
Even worse, putting these people who desperately need medical treatment in "mere housing" is very likely to cause the "mere housing" program to fail when it could have succeeded. The homeless who need "mere housing" don't want to be near the homeless who need "significant medical treatment" any more than anybody else does.
Homelessness has an "Amdahl's Law" nature to it. You have to separate out the different types of homelessness and apply the correct solution. And you will only gain the improvement for the group you "solved".
Consequently, you can solve 20% of the homeless problem and people will still say you "failed" because 80% of the homeless are still in their vision.
Some homeless people aren't capable of the maintenance of a home due to mental or physical issues.
Some homeless people refuse to accept help for mental issues for fear of being trapped in a psych ward.
Simply put, you need to split homelessness into temporary and chronic populations. For the temporary group, homelessness is the problem. For the chronic group, it is a symptom. Treating the symptom will not have a long-term impact on much of the population.
Source: conversations with a social worker friend who spent years working with the homeless population in our metro area.