It’s just that your statements are incorrect about families. The real numbers are: “In the county, children (ages 0 – 17) are 23 percent of the total population, in downtown, they are only 10 percent of the population.”
The benefits of being in the denser areas versus the believed drawbacks are changing, so much so it makes me genuinely hopeful about one day having 10 billion people versus 8 on the planet, which for someone who wanted less people not more, is notable at least and hinges on this shift. So I would recheck the numbers often and along new metrics, and favor first-hand information in times of change.