Soon enough what used to be a 500 meter walk turns into walking 2 kilometers because of all the car-related infrastructure in the way, which then becomes a self-reinforcing feedback loop as more people own cars, so they're willing to travel longer distances, reducing the business & zoning incentive to make things walkable.
E.g. in my hometown every building in the city core is accessible by car, but you have to take narrow, often single-lane side alleys to get there, the major paths all are pedestrian only. All that means taking a car there stays the exception for when it really is useful to do so. Tons of inner-city routes that are faster to walk than to drive. The further out you get, the more car-friendly things get, but public transport bridges most of it. Density is key to maintain that, it makes public transport and local businesses viable and puts pressure on cars.
Making large areas completely pedestrian-only isn't really politically viable, even here in Germany, but the compromises IMHO can work out fine, and people move to areas that have the characteristics they like.
As long as you are dressed appropriately then a 200m walk in the cold is nothing.
If it's snowing I almost never drive (if I don't have to) but I have absolutely no problem walking to the store, or to pick up food, or even just to get out of the house in the snow.