In cities which, as has been pointed out to you, are examples of bad city design and bad public transportation.
This is as inane as claiming all chicken is bad because you got food poisoning one time.
Thank you for agreeing a car isn't necessary.Food can be delivered as well, negating the need for local markets.
Which is far easier to gauge with smaller, more frequent trips. Again; you're not demonstrating that cars are superior or more flexible.Only if you are buying more than you will consume in a given time period.