Yeah, I live a block from my grocery store in SF, and I still only go 1-2 times a week unless I need something fresh for today / missing ingredient, which is rare since I plan ahead and only buy things that will last at least a few days.

Living in a dense city like SF is great for somethings, but it sucks when you want to leave, and paying almost $400/month for parking isn't good either. Both lifestyles have their advantages and I think it really comes out to personal taste and choice.