I don't know about that. Things don't change overnight, and never by themselves. Advocating for a more walkable city is probably a good idea. Might require political action of some sort. Or maybe it just needs a critical mass of frequent walkers.
For the record, I live in a walkable city now, and grew up in a tiny, walkable villagle. Wouldn't even consider moving somewhere that wasn't walkable.
Addendum: a city that isn't designed for people probably shouldn't be considered a city. I'm trying to think of a better name, but I'm stuck on expletives.