Title is a bit tongue in cheek, but some days remind you we do need autonomous cars, as many driver's ability is so bad. I had virtually all of them today.
The brake checkers, for no reason at all.
Erratic speed drivers, even on a clear and straight road, dropping back to 40mph.
Those who have no idea of which lane to use on a roundabout, even with specific road markings.
No indicators, even where there are specific signs "please signal".
Sudden braking and turning off, again without signals.
The wanderer, all over the road, out to the line and next moment in the kerb.
The constant speed driver, no idea they have entered a 30mph zone. (Usually 40 - 45mph everywhere).
The only one missing today was the driver on your bumper, when is a steady traffic flow.
I wager many of these drivers are the first to say "autonomous cars won't be as safe as having a human in control".