At this level, the fact that most people prefer not to be homeless is an objective one, even though all those people’s preferences are subjective - which is the same point as is raised in Why Capitalism? about material wellbeing - so I believe Daniel is correct there.
The issue is whether this leads to the conclusion that state intervention can ever raise material wellbeing for the general population in a given area, which I don’t think it does. But that could at least be a productive debate.