> Those municipal governments are terrified of crazy activists and have completely abrogated their responsibility to the rest of citizenry and to the homeless.

It does seem that whatever solutions they have implemented so far don't work too well.

Are there cities that solved or at least made significant progress with homelessness that it would be possible to replicate.

Who are the activists? Are they homeless themselves I wonder. Otherwise I have observed quite a few times when activists' interests and motivations don't align with the those of the groups they claim to represent