No car (except certain prototypes) drives itself.
Self driving cars can be any type of power plant. It doesn't have to be an electric car.
If you are letting your Tesla drive itself, you are placing other vehicles and danger and breaking the law. Tesla itself says not to do this.
Last CES I was at, where they were showing off self driving cars and autonomous robots, a self driving car ran over an autonomous robot. Was the robot jaywalking? Was the car taking murderous revenge on competition?
In this case, of course, it only resulted in one group of programmers shouting at another group of programmers on who's fault it was.
Now imaging a real case, where a self driving car kills a pedestrian. There are no drivers at fault. The only place the lawsuit can go is right back to the car manufacturer. Invest in it if you want to, I wouldn't touch that industry with a 100 ft pole.
Self driving cars are in their infancy. Do not judge them for the future. They are coming. The question is when.