I have to agree. If health is made so you absolutely need houses to keep from falling into unhealthiness then they will do their job. Also as Killtech said in the past, having buildings limit population would cripple the AI if they did not know to build the housing buildings. We could have tons of level 1 cities just because they never built a hut. At least with health we know the AI can build health buildings and respond to that factor. In short the core the to housing is really health and the whole concept that houses keep you out of the elements and houses get better over time.