Pick a random terraced road in Bristol [1] or Birmingham [2] or London [3] or Norwich [4] and you'll find terraced house residents are not yet living without cars.
If our nation's goals require such people to live without cars, I would say we're a long way off - and we're not particularly moving in that direction either. Hell, the current government's plan for the next election is essentially the opposite.
[1] https://maps.app.goo.gl/JUVD3xy4qRuP78VP8 [2] https://maps.app.goo.gl/CGfDGEibG3zQij8MA [3] https://maps.app.goo.gl/TXZYFuuQC3aQiam56 [4] https://maps.app.goo.gl/srs27pyGuzobhp1V9
Not always a thing. Plenty of "dense" neighbourhoods have less-than-ideal transport systems. Few of even the most dense run 24/7 bus/train service. Not everyone works a 9-5 job near a bus station. Im in a dense area, in an apparment building beside the largest hospital. Bus service doesn't start until 6am, meaning it isnt an option for my work. Nearest passenger train is hundreds of miles away.