Crash Test Dummies.
It's shocking really as Tesla are doing a massive beta test with this software, and someone has died as a consequence. And they then try to blame that person.
Inevitably when you have autopilot engaged you will start to lose concentration and start to learn to let the car do the driving. This will happen even if you've got your hands on the wheel and you are looking straight ahead. You will start to get complacent and trust the car. At this point you will lose valuable time, if the car doesn't do what it's supposed to and you need to take over. You will have to re-focus and evaluate the situation around you, which you probably aren't prepared for.
Just better hope there aren't too many fatalities before the software gets good enough. And by good enough, I mean something like 10x safer than a human.
Even when it's 10x safer, you are still going to be rightly upset if one of your loved ones gets killed by mis-behaving software.
Still, once we get over this hump it's going to be super safe and everyone will forget what all the fuss was about.