For people living in very specific parts of the city (see: the Mission) the lack of a real metro has made BART into a pseudo-subway, but at the end of the day it's still commuter rail (the seating arrangements in a BART car is telling as to its intended purpose).

San Francisco doesn't really have a metro system - it has streetcars that don't have exclusive right of way through the majority of their run.

If you want to remove cars from the road and have people live in a larger area, mass transit needs to accomodate them.

This isnt fucking reddit, take your sensationalism elsewhere. It's really easy to pick on transportation systems when you have absolutely no idea how spread out everything is.