I stopped reading here:

“If San Francisco residents really believed that sea levels were rising, they’d have all sold their homes by now.”

Apparently the author has never been to San Francisco or seen the sea level estimates for the next 30-70 years.

The last time I looked the northernmost and easternmost parts of SF will have some trouble, but by far the biggest areas of concern are east of 101 south of the city. And yes, if people thought ahead that far they would probably be concerned but even in the areas that are predicted to have the most impact we’re still talking 25+ years.