Cars don't kill cities, hi-rise buildings do. A thousand people getting in an out of on acre of land will cause all the problems we see today in big cities. Stick your head out of your window office and see how many people there is in your own acre and then imagine how many cars are needed to move all of them. If I were a benevolent dictator I would prohibit all buildings higher than a story and solve the traffic issue once and for all.
You say you like tall buildings? Then enjoy your damn traffic and shut up.
What you've just described is known in the planning field as suburban sprawl, and is not without traffic problems of its own.
If you start with an assumption of auto-dependence, then your conclusion follows, but the article is really arguing against making that assumption in the first place.
You can't decouple urban density from traffic of any kind, be it pedestrians, bicycles, cars, buses or even flying cars, they go hand in hand. There is no magic trick to solve it no matter how much money you throw at the problem.
Show me the city in the world with the worst traffic and I'll show you the city with the highest buildings.
Only accepting that fact we can start planning better cities. Also worth considering, giving telecommute a high priority, since most of the office work done in these big cities can be easily done from home.
Suburban sprawl becomes a problem only when those millions of people have to drive downtown to work clogging the driveways, but traffic is not an issue in suburban areas per se, lower urban density wins again.
You say you like tall buildings? Then enjoy your damn traffic and shut up.