There are more than one kind of homeless person. There are the ones who simply fell on hard times and don't have money to pay for rent. There are the ones suffer addiction, there are the ones who suffer mental trauma there are the ones who have severe mental disorders, there are the ones avoiding regular society, etc.

Housing first works best for the fist class as well as those who have succumbed to addiction. Some of the others require intensive intervention, perhaps institutional. As someone pointed out, its complex, but it's something beyond any individual's purview, responsibility, etc., so inhabitants who do pay taxes, etc., should expect some kind of organization would be responsible for addressing the issue rather than the knee jerk public castigation for speaking one's opinion about a social issue.