Yes, planes can fly without the pilot doing anything. But there are not that many commercial planes flying right beside each other that you can actually see them 50 ft away. Are you going to fly on an airline with dozens of other planes criss-crossing each other in the sky? Not me. I also doubt that any of the pilots in an airshow will allow the autopilot to do everything especially if they are flying tip to tip. And this I don't know, so one of us Terbites who actually know the answer might correct me.
And you have to eventually look at the insurance and liability issue. In an accident with the car on autopilot, with the driver not touching the wheel, who is liable? Is it Tesla? I am sure they don't want the liability. What about the driver? Is he or she responsible? Is it the government? They licenced the car for use on the road. Look at car companies that have issued recalls and with defects. Audi had a problem with drivers who swore they put their foot on the brake and were likely accelerating. Airbag problems caused car companies to pay out. Do you really think they will pay out for the autopilot getting into an accident? Which software engineer will put his name down if these things start to re-boot at 120kph or have a hard drive/flash drive/whatever failure on the 401 in traffic and cause the biggest traffic pileup in history.
And most importantly, if nobody is speeding, what will the cops, lawyers, courts, government, do? Revenue will drop. Cops will be unemployed. No tow trucks on the highways. Etc.