I was going to make a flippant comment about "Congratulations on living in San Francisco!", but hilariously, there's a better chance you live in Los Angeles (lower ridership percentage, but significantly higher population).
Even in Oklahoma City, where only ~1% of people commute via mass transit, there are still thousands of people who can live happily without a car because mass transit serves them fine. That does not mean that Oklahoma City has a great transit system.
I live in Oakland, have lived in San Francisco for a long time, frequently work in LA, and have lived in London, Amsterdam and Barcelona as well, so I feel I've had exposure to a good variety of transit systems in order to form my opinion.
Even in Oklahoma City, where only ~1% of people commute via mass transit, there are still thousands of people who can live happily without a car because mass transit serves them fine. That does not mean that Oklahoma City has a great transit system.