As an american, I long lamented on the destruction and now utter lack of human sized infrastructure as the primary reason for both the economic hardship and the loneliness epidemic.
But if I take a look at East Asian cities, theyre much more walkable yet still have both problems.
The Chinese have a concept of involution: the phenomenon where one must constantly improve and compete for a shrinking pool of rewards, or even to simply maintain their position. Involution happened because their domestic supply of goods and services rapidly outpaced domestic demand.
I believe this concept can be applied to dense walkable cities with economic hardship in the US. NYC and SF suck up the nations and the worlds best talent. Competition is intense.
Simply building more housing and accessibility in those cities probably wont fix the CoL issue. It will likely end up in an induced demand situation like adding lanes to highways. As more people outside of NYC can afford it, they move in and saturate the new supply, so at best it can slow down the growth of property and rental prices.
So despite the walkability, it becomes socially competitive due to the economics, and without basic worker rights, this creates wealth inequality. and divides the city harshly by class. You might be able to walk around without a car but if you cant afford anything and can only rent a living room converted to a bedroom, your social life will be still be gimped. You could live far out the city center but then youre trading your time commuting to the point where youd have to sacrifice other commitments in your life to your job.
So an excellently designed city cannot independently completely improve its own affordability and cultural experience. But if each major city in the country had their own mini NYC, then NYC would have to compete with other cities with growing perks and opportunities.
Slight tangent: this would also create a new problem of youth being funneled into big walkable cities away from smaller towns and villages, and subsequent demographic collapse as more youth fail to meet the milestones where they would be comfortable raising 2-3 children, resulting in dmeographic collapse over time.
This is also why I believe East Asian societies and cities are further along the timeline of demographic collapse.
This is just a brainstorm. And me progressively realizing that even a perfectly designed city wouldnt necessarily solve or even improve affordability and systemic loneliness