"you also do that" implies the above isn't actually a myth.
Seriously though, there are at least three groups of homeless with some overlap:
- people who had a hard time, lost everything, but if given opportunity they will use it to recover
- addicts, for whom the addiction drive them to homelessness, they need to go to rehab, before they can be helped (seems like this meme refers to them)
- mentally ill, who don't have family, or family doesn't care about them. They need medical attention. Those are the hardest especially since most don't want to be helped