I can tell you aren't from SF. Because no one from here calls it SanFran. But I digress. Uber is huge here because it is where it started. And buses come with other baggage. Many homeless people and plenty of pervs doing shady things deter people from using the system regularly. Having seen the system it is substantial, but getting out of the city is the issue. San Francisco proper is very small 7x7 miles (49 square miles, Easter egg from being 1849 and the 49ers). But going anywhere outside of the city is where things take forever and why most affluent people do not use those systems. 2 hours back and forth is not economic on time.