In a typical midwestern city, anyone who can afford it commutes to the central business district by car. They live, shop, and eat in the suburbs. They use their cars for all of these activities.

The C.B.D. ends up deserted at night when the office workers leave. Any successful night-time businesses have parking, in order to attract suburban customers. There is little reason for anyone to be on foot.

The reddit thread mentions very specific districts where you find pedestrians. I imagine those areas have excellent central parking, and deliberately-created "walkable" areas for browsing. A great development pattern to bring life back to deserted downtowns.

And, as I was walking about at rush hour, I expected to see a lot of car traffic, but the streets were practically empty of autos. The nearby freeway across the river was quite busy, however. I think the reddit thread had good things to say about the former decline of the city center.

I was one of the people who mentioned some of those places in that thread. There are such places in St. Louis, but Strange Loop (which I also attended) is not held near any of them. Most of the stretch talked about in that thread, from 9th and Market up to Union Station, is kind of a pedestrian wasteland (for lots of reasons related to density, failed urban renewal projects, and so on). Nobody in St. Louis goes to Union Station anymore; it's a complete failure of a project. But, likewise, nobody here would use it as any sort of example in a conversation about foot traffic in the city.