R.J.
I agree...Not everyone can or should drive.
She may well have a sensory processing or assimilation issue, or panic issue, that makes it *impossible* for her to drive, and that fear is a direct relation to that. It's a healthy response letting her know NOT to do something highly dangerous. To simulate a sensory processing issue turn on the radio so loud it hurts your ears, then turn it down JUST a tad. Now. Turn on the TV the same way. And start the vacuum. Give the kids pots and pans and tell them to bang and to flick the lights on and off. Call your chattiest friend. THEN, do your taxes. With all of that going on.
With a LOT of effort, you can probably get your taxes done, and done correctly.
But why on EARTH would you?
The headlights, traffic lights, speed variances, corners, oncoming cars, same direction cars, pedestrians (on the sidewalk, even), blurring motion... all of these things to certain people create the same kinds of conditions (overload, distracting, can't THINK straight, can barely SEE) to people with certain sensory or panic disorders.
You don't WANT them on the road. Unless they're a passenger.
Think of something you're afraid of. For me, it's spiders. If my son were dying, I could get in a car full of spiders and drive. PROBABLY without wrecking. Just imagine the car filled with something you're afraid of. Would YOU get into the car for anything short of an emergency?