Some public transport there works well. I've taken BART from the airport to a hotel downtown and it wasn't a bad way to get there. I felt safe, should I have be

Some public transport there works well. I've taken BART from the airport to a hotel downtown and it wasn't a bad way to get there. I felt safe, should I have been concerned? Most of your other points about mass transit are quite valid. E.g. "lugging" groceries. But why not "think different"? Can't you purchase in small quantities from neighborhood stores? When I grew up in NYC it wasn't uncommon to shop just a block or two from home. You bought 1 loaf of bread, 1 quart of milk, a few pounds of potatoes, etc. It was easily possible to carry that stuff back to the apartment. It wasn't only possible, it was what you had to do. Hardly anyone owned cars. I wonder what percent of residents of San Francisco own a car? How many use a car daily?