I imagine insurance would be split in two in that case. Carmakers would not want to be liable for e.g. someone striking you in a hit-and-run.
So yes, carmakers would pay in a hit-and-run.
Why? That's not their fault. If a car hits and runs my uninsured bicycle, the manufacturer isn't liable. (My personal umbrella or other insurance, on the other hand, may cover it.)
If you run into someone on your bike and are at fault then you generally would be liable.
They're talking about the hypothetical where you're on your bike, which was sold as an autobomous bike and the bike manufacturer's software fully drives the bike, and it runs into someone and is at fault.