You're missing the point, which is that the the maximum carrying capacity of a road is a function of the skill exercised by the drivers.
The issue revealed here is that even a small number of unskilled drivers can do terrible things to the flow of traffic on busy roads. In other words, crowded roads have a very low tolerance for bad drivers.
Since the number of disruptively bad drivers is so remarkably low, and their negative effect is so stratospherically high, a program designed to improve their skills could save astonishing sums of time and money.
So it's not about "calling them the problem and calling it a day." It's about actually fixing the problem. And you don't need to single people out to do this. Rather, you set the bar for licensing at a level that they'll need to do additional work to cross. Given how few of them there are, this can be done with no disruption to 99% of the drivers on the road, and major benefit to 100% of them.
The article specifically mentions that it's not driver skill which is the issue:
These commuters aren't necessarily slow or bad drivers.
Instead, they come from a few outlying neighborhoods and
travel long distances together in the same direction like
schools of fish -- clogging up not only the roads they
drive on, but also everyone else's.
The issue revealed here is that even a small number of unskilled drivers can do terrible things to the flow of traffic on busy roads. In other words, crowded roads have a very low tolerance for bad drivers.
Since the number of disruptively bad drivers is so remarkably low, and their negative effect is so stratospherically high, a program designed to improve their skills could save astonishing sums of time and money.
So it's not about "calling them the problem and calling it a day." It's about actually fixing the problem. And you don't need to single people out to do this. Rather, you set the bar for licensing at a level that they'll need to do additional work to cross. Given how few of them there are, this can be done with no disruption to 99% of the drivers on the road, and major benefit to 100% of them.