Medium term - Build bike lanes, convert streets to promenades, build light rail, build traffic calmers (narrow streets, speed bumps, lane bollards)
Long term - Marketing programs to encourage different business lifestyles (city vs. country, remote vs in-person). Tax incentives for moving out of the city.
Certainly I'd find that lifestyle less difficult to plan moves around. Of course, I'd also find it fulfilling and depressing.
That isn't a rule of thumb at all, just your opinion...
I don't think it makes sense to make things denser if it's going to be so ugly that no one wants to live there.
Very rarely, if ever, are buildings "so ugly that no one wants to live there", especially when places to live are as scarce as they are in SFBA.
also, transit oriented development: https://en.wikipedia.org/wiki/Transit-oriented_development
Just FYI, people saying things like this is definitely a key part of why us New Yorkers think the Bay Area has literally gone insane.