NYC is an extreme outlier, we love to see it, but about 98% of the US doesn't live in the area served by NYC transit. I am sure the population of Minneapolis is much smaller, too.
The vast majority of the US is prohibitively difficult to traverse by any mode except car. (Actually, it's usually a highly frustrating and dangerous experience by car, too.) I see reports of more than 60% of the population living in suburbs, which are, as a general rule, designed to discourage non-car travel.