Regardless of the difficulty, an attempt should be made towards all or at least some of these ideas. Just speculating that it's too difficult and not even trying shouldn't be acceptable.
That said, I think plenty of this is realistic and achievable - just not with the voters we currently have. Maybe the next generation will be more compassionate and in my old age I can see the beginning of progress.
Cities can do more than you might think. IIRC some cities plan to cover universal community college, and I know some have universal pre-K. Large cities have health systems.
SF already has free community College. It also has free public Healthcare for the poor (or at least did). Last time I was aware, they changed it so that only illegal immigrants were eligible for coverage.
Like most US community colleges, it was already extremely cheap, ~$2,500/year for a full time student, but this can still be a barrier for some people.
That said, I think plenty of this is realistic and achievable - just not with the voters we currently have. Maybe the next generation will be more compassionate and in my old age I can see the beginning of progress.