Sure it is, but it's doing a hell of a lot better than many critics thought ever possible.
>Self-driving cars need to be even better or people will die.
People will always die. Requiring with certainty that self-driving cars will never cause accidents is a purely emotional instinct with no regard for facts or well-being of people. The only thing that self driving cars need to demonstrate is statistically lower deaths or injuries caused per mile (or hour) of driving than the average human would cause. This would mean that adoption of technology would reduce total deaths if substituted for human drivers, which is what actually matters.