Additionally, if driverless cars are being tested on public roads, you need laws and practices that are robust enough to prevent the kind of accident that killed someone. They had only one operator in the car, who was responsible for monitoring the car and logging information about its performance. They had specifically disabled safety systems which would have caused it to brake sooner.
Even if its expected that driverless cars will reduce fatalities due to drunk or distracted driving, you need to have sufficient evidence of the improvement, safety systems in place for test systems, and public discussion of the tradeoffs and what situations driverless cars might perform worse in than human drivers, because lots of people have behavioral expectations based on human drivers; things like making eye contact with a driver before crossing the street.
So yes, it is good to be working on and testing driverless cars, but you need to have a serious sense of humility and safety about it, and not push it, because even if you are incredibly safe you can expect some backlash, but if you miss the mark at all and oversell the safety, you'll get a lot more backlash, with justification, much sooner, which could set the whole program back significantly.