These shouldn't be thought of as orthogonal issues. You can dramatically improve the walkability of a place by reducing the amount of space reserved for parking.
City centers in forward-thinking European cities are trying things like this: forbidding cars from the central square and a few blocks' perimeter results in much calmer and more pleasant pedestrian experiences. Instead of roads for cars you have pedestrian boulevards, avenues, and alleys with greenery throughout and a distinct sense that you live in a community, rather than merely among it.
Not to say this can't be done elsewhere but this seems like a place that was going to be popular / this was going to work regardless.