Besides one or two main thoroughfares, the streets are absolutely narrow considering how many people are there during these events. Or hell just during a Sunday. Driving in downtown/chinatown yesterday would be extremely stressful and ill advised for the best of human drivers. IMO.

EDIT: actually you’re probably just remarking that parking sucks which hell yeah wtf, get those cars outta there. Street parking in sf is already so bad that they need to bite the bullet city-wide and commit to transit.