While I appreciate the sentiment, biking in San Francisco is far too risky. The time savings vs walking isn't worth the health implications and the stuff you have to carry on you.
While I appreciate that sentiment, there are places other than San Francisco! Still, actual good public transportation is probably a better first step than trying to get everyone to ride.
Bicycles are not always the answer, especially not in a city as cold, hilly, and overrun by suburban drivers as San Francisco is.. People from Marin, Walnut Creek, and all over the peninsula & south bay shouldn't be allowed to drive in San Francisco, but they do, often hitting other objects on the road.
No offense, but it sounds like you are too afraid of the city to leave your house. Perhaps you should see a therapist instead of lobbying for some special public transit lines for people that are exactly like you?
shrug I will not get into this debate, I've yet to meet a cyclist who isn't blind to reason about being sure that their lifestyle is the correct one for eveybody.