I have a hard time reconciling this comment. If you gave each homeless person a house/apartment, in what way wouldn't you have solved homelessness? Are you saying many/most of them would abandon, destroy or otherwise not use those houses?
Yes they made choices in life that led them to not be able to hold a job and pay for housing - but to say it was "bad choices" one need context of their lives to judge that and in addition it might be the case that choice was made for them and they could not do much about it.
There were (I think still are in many places) projects where municipality in Europe would create social housing and putting let's say "not that lucky people" in one place does not help but creates its own problems. Where just providing flats was not enough because later no one had time do social work or money to pay social workers.
I can say as a kid I was living in such a project, all of the "normal-city" people would refer to us as "special place" or "street of magic". Many people made their lives better or at least make it stable there. Some managed to burn down their flats creating problems for their neighbors. Then there was loads of shady stuff going on.