> It's a far easier problem economically to focus on those who can't afford a car than to build out public transportation networks.
That's a very shortsighted statement. The costs of universal driving in terms of property damage, human injury and death, unproductive time spent commuting, traffic, inefficient urban design, resource expenditure, road maintenance, etc. are significantly higher than those of public transit.
And if you don't believe me about people who simply can't afford to drive, what about people who physically can't drive, like the blind? Or people who physically shouldn't drive, but are sometimes forced to do so, like people who suffer from narcolepsy or get intermittent seizures?
The only reason people don't have the option of avoiding driving is because of poor public infrastructure decisions and in some cases poor personal decisions when we can easily afford to do otherwise. Why do we make these poor decisions? Because we think driving our fat asses around in 5000-pound behemoths is a "right" that needs to be accomodated everywhere, but walking and cycling aren't. It's not science fiction--people managed to do without cars for thousands of years.
Setting all of that aside, if you're operating a motor vehicle that could easily kill people out of inattention, you're putting the public at risk and you have a responsibility to demonstrate you can do so competently and responsibly. Not being killed by cars is a more important right.