Perhaps that particular human was special and worth saving over the other two who were saved instead, but I am not aware of any reason to believe that.
Only after a particularly tortured interpretation of highway safety statistics.
If you exclude pedestrian deaths (Few jaywalkers on the interstate), motorcycle deaths, deaths in conditions where autopilot cannot be used, and deaths due to collisions of lighter, less safe, older, or poorly-maintained automobiles, then regular highway death statistics start looking better then autopilot-enabled ones. [1] [2]
Again, there's a great gap between the hype of Tesla, and the reality.
[1] https://www.technologyreview.com/s/601849/teslas-dubious-cla...
[2] http://www.forbes.com/sites/samabuelsamid/2016/07/05/adding-...
The impact of that, terrifying as it may be, is still significantly less then the impact of a self-driving-but-buggy vehicle into the side of a semi.