Exactly. Not everyone wants to live in a "walkable" city. I would hazard that most in fact don't. A city is a place you go for services. It is where the big shopping centers and hospitals are. It is where the corporate HQ is. But people want to live in a more suburban or rural environment. Personally, I don't want to go shopping ever other day at a boutique corner store. I want a time-efficient big costco run every few weeks, something not possible on public transport. I want a yard where my dog can hang out unsupervised without worry about stranger dogs coming around. I want to set off fireworks on holidays. Listen to a country-western station. That is the lifestyle that a great many people dream of living.
I used to work with a guy from Belgium. He is now in Canada. The guy works in IT (secure stuff, government) but he loves animals. So he commutes over 50 miles to work each day. Doing that means he can have a hobby farm where he keeps a few horses. He bought an old tractor and is looking at growing/bailing his own hay next season. His lab just had puppies. His kids are growing up on a "farm" but go to a great school and have faster internet than I do in my "big city" apartment. Such a lifestyle just isn't possible without easy personal transportation.