Unless you redefine community to mean 'anyone within a particular geographic area' which renders the concept meaningless.
If you stroll into homeless communities you'll see a pretty common thread: Addiction. When someone ends up homeless due to drug/alcohol abuse, there's often very little a family can do to (productively) help short of an ultimatum "Get Help or Get Out". Whether it's effective/right or not, many of those families feel they are taking care of them by giving them the choice of continuing to live the life they've chosen or accept help ... with a myriad of conditions attached.
Source: have had a friend slide into homelessness. It was horrible for all friends and family, and probably worst of all for the one becoming homeless.
After you've elected to trust that individual one more time only to find the last remaining valuables you owned have been pawned for a fix.
People in poverty have difficulty accessing health care, and birth control goes along with that. Depending where you live, there might be a holy war being waged on free birth control. If your parents are homeless, you might be put in a foster home until you're old enough to be a homeless adult.
Given the numbers of homeless, obviously many do not. Not even for vets who risked their lives and gave their physical and mental health for their country.
