Really? I haven't found a statistic about "violent crime" in general, but this one about the homicide rates in 2022 among the 75 largest cities in the US:
Chicago and New Orleans were the nation’s murder capitals in 2022. They're just two of the local governments in America’s homicide hot-spots that continue to falter in their role as protectors of public safety more than two years removed from George Floyd’s murder and the covid pandemic. Chicago...
wirepoints.org
San Francisco is, among the 75 largest cities, the 18th most safe (6.9 per 100k), right after Austin TX (6.8 per 100k).
One decimal difference.
What's your guess for the city with the highest homicide rate? Chicago?
No, New Orleans (74.3 per 100k).
Chicago is the 13th highest (27.7 per 100k).
So San Francisco and Austin are less than 1/10 of New Orleans, and a bit less than 1/4 of Chicago.