Au contraire, San Francisco is a major financial center, trailing only New York and Boston. Downtown is filled with hundreds of thousands of sober-minded, conservative people every day.
Then before it gets dark, we all go home, and the vermin emerge from the shadows.
You're close. It's now a computer room in Chicago. The Pacific Stock Exchange closed down their trading floor 3 years ago.
The "Financial" district now refers to all the lawyers that infest that region, skimming money off the economy and driving up medical and other costs.