Moving from downtown SF to a suburb of SF does not count as "leaving San Francisco".

You're still using the same airport. You're still able to have in-person meetings with the same people. Travel time from SF downtown to your new place is significantly less than between two opposite ends of Beijing or Seoul.

Disagree because (a) crime is significantly less and (b) the travel time into the city acts as a blood/brain barrier that significantly reduces the frequency of meeting people in SF.

It’s a significant cost. You’d only take it if SF proper wasn’t working.