The map actually does a good job of highlighting how population dense places exist without a lot of cars per person. New York and San Francisco are both shown and have green or yellow patches. Mass transit works so damn good but, like election maps, the actual region highlighted is empty space with a few people all doing the same things.

The real alternative to cars isn't public transit; it's walking and biking (with zoning density that facilitates that). Public transit is a 'nice to have' layer built on top afterward.

Not everybody lives in the US and in a lot of countries being able to go to work without a car is normal.

I mean there are a lot of people that do go without cars. I went without a car for 8 years because I lived on a bus line and I worked on a bus or a train line depending on how far I had to go. The commute sucked sometimes was over 2 hours. There are times where I had to be on the bus at 4:30 in the morning to be to work at 6:30. And when you go 4 to 5 hours a day just commuting a car is very nice because that same drive was maybe 45 minutes between morning and afternoon. That gives you so much more time to do everything else. Having a functioning system doesn't mean much when you have to go so far.