The second article was about the declining numbers of children in San Francisco schools. Once again, the question of why there aren't children in San Francisco wasn't addressed. The problem that the article discussed was how to avoid laying off teachers when they weren't needed anymore. According to what I can find, demographically, around 15% of San Francisco residents are 19 or under, whereas a sampling of other cities shows a 25-30% 19 or under demographic. The solution for the San Francisco Unified District was to close schools, but absorb all the faculty and staff into other facilities, so they wouldn't lose their jobs. In neither of the articles was there an indication that the absence of children itself was a matter for concern.
Considering the price of housing and cost of living in the Bay Area generally, I wouldn't call it the most family-friendly place in the country.