If individual engineers and executives were made to be legally responsible for potential fatal accidents resulting from technology, progress would grind to a halt.
Obviously this would also mean that compensation would have to go up for self driving car engineers and execs to compensate for the risk. That's fair, and, if that cost makes a self driving car venture uneconomic - again, not viable. And that's okay.
People take responsibility for other people's lives every day when they get in a car. I don't think the idea that Uber engineers should do the same should be considered particularly controversial.
The tricky part is figuring out what constitutes negligence.