Earlier quoted context omitted.
Probably because "training" implies direct and constant supervision, which would almost completely avoid any chance of incidents because the human is in charge at all times. Deploying an unsupervised robot on the general public for training purposes is even worse than for testing purposes.
Why? If it is already safer than human drivers (as they claim), training and testing are both okay. Not even just okay, but a good thing!
They are not safer. They are constantly behaving like this:
- https://twitter.com/desertflyer/status/1677464706251128832