I believe it does because the greater distance cars allow you to travel mean the areas you spend your time in are less likely to coincide with the areas others spend time in, so unlike the small town I grew up in, people don't become familiar, then friendships don't form. The car also allows shopping in large supermarkets, which result in the local shops closing down, and chance to become familiar with faces of the staff and fellow customers is lost.
I've been at parties and been recognised ~"I see you cycling along xxx", which I can't imagine happens to people who drive, both due to the enclosed nature of cars and the speed.
https://consumerist.com/2011/07/22/study-people-love-their-c...
Also some people have physical abilities such that walking is not a valid lifestyle choice. For instance, two year olds.
I'm pro-walkable spaces. But it's not across the board superior to other arrangements.
> For instance, two year olds.
Probably easier to push a child on a stroller through a walkable area than to put it in a car and drive to a location. Less time-consuming and better for the environment as well.
As well as walkable spaces being better for the elderly who can't legally drive and the handicapped who can't legally drive as well.