If the Model S didn't have the camera, I can guarantee you that there would be people posting that it isn't needed and that it's a good thing that it isn't there. I've seen other forums where people made that argument about their cars, and also claimed that they wouldn't want to pay the extra money for one. If a particular model of cars sold 30,000 vehicles and a single wrongful death lawsuit brought in $50 million dollars, which is a realistic number, then you have to concede that it's realistic to expect the average insurance premium to go up by a significant amount, since insurance premiums are based on how much is paid out. For cars that are sold in higher numbers, the number of fatalities will be proportionally higher. So the arguments I hear in other forums don't show added cost over the life of a vehicle, but a probable decrease.
So why is it that nobody here is arguing that rear cameras are unnecessary since the car has good visibility, backup sensors for a fraction of a percent of the overall car cost, and people can look over their shoulders? Why isn't anybody here pointing out a single feature that's unnecessary that you wouldn't pay to add if it hadn't been there? Maybe I don't need a screen to show me what percent my sun roof is open because I can look up. It seems to be coming down to "I own this car, everything is right about it, and nothing is missing." The problem with that argument is that it's self contradictory. It includes the notion that it's good to have a car that can add features with wireless downloads.