You have to read the whole thing to understand that the implication is false.
SAE Level 4 self-driving vehicles (those capable of full self-driving without a human at the wheel) performed especially well by several metrics. They were roughly 36 percent less likely to be involved in moderate injury accidents and 90 percent less likely to be involved in a fatal accident. Compared to human-driven vehicles, the risk of rear-end collision was roughly halved, and the risk of a broadside collision was roughly one-fifth. Level 4 AVs were close to one-fifthtieth as likely to run off the road.
So if you ignore all the horrific accounts of Tesla FSD casualties because Tesla is Level 2, not Level 4, then AVs are already saving lives.
Level 4 AVs are worse at dusk and dawn, better in rain and fog, worse when making turns, better at staying alert with no fatigue, better at staying on the road.