sometimes it is a chicken or egg issue-did the person become an addict after they became homeless, because homelessness was so hard to bear? Or did they have this problem and become homeless?
I have a problem feeling sorry for addicts, too, but i see a difference between people who are blowing up their chances and BECOMING homeless vs. People who are homeless and become addicts because there is so little else in their world -- the latter are also more likely to want help to get clean... it isn't their norm...
There are few services available even to housed individuals and without an address services are almost impossible to access.
Our society is upside down in not caring for addiction and mental health services for people who need them the most, including the homeless.