And what does building for people look like, precisely? I live in a 1910s London housing estate with pretty ordinary single family sized homes with gardens and lots of green space. Cars were not really a big deal when they designed and built the place, pretty much everyone walked everywhere and had e.g. coal and milk etc delivered by horse. Its no slum and is generally seen as quite a desirable place to live even now and commands a premium.

Yet this is no utopia, despite being designed for people (...and horses!).

It takes 20 mins to get to the tube station or the area with the shops on foot (3 or 4 minutes driving - and these are small shops, not even big ones). Like what do you actually want it to have? A supermarket on every street corner? And a tube station and doctor's and a dentist and a cafe and a school and a cinema and a sports center and a museum and a library, on every corner? You can't have that density of things people want all within 5 or even 10 minutes walking unless you build some sort of ultra high-density high-rise city of the future where 10s of thousands of people live in a single 250-storey building (and then you end up "commuting" inside that buildings elevator system...).

Back in real life what you do have is a 5 minute walk to the bus stop where you wait for 5 to 10 minutes for the bus to come, then you sit on the bus for 10-30 minutes while it slowly slowly slowly goes some indirect route and then you get out and walk 5 to 10 minutes at the other end (assuming there is a single bus route that goes roughly where you need and you don't have to get off and wait again to change to another route to get to your final destination...). Then repeat the return journey carrying 15kg of groceries. Eventually, 2 hours later, you get back home.

Or just drive for 10 minutes to the shops and drive back. Which is what everyone does because people can't spend multiple extra hours a day just for getting around on foot and bus to buy food for the next few days (and you can only do a few days at a time as your are physically limited by what you can carry) or going to the doctors or getting the kids from school or whatever.

The tube is great but it's very very very limited in where it goes apart from the very center if London. Once you are outside zone 1 the gaps between stations and the "spokes" of the different lines becomes considerable.