What I'm saying is that it helps, not that it's a silver bullet. But we seem to be stuck in a mindset that self-driving needs to be perfect within the current practice on the road. The more I drive the more it's obvious how human drivers are horrible and often in ways that are extremely easy to police automatically (e.g., tailgating can be checked for with the current toll infrastructure in some of the roads I use). If we want self-driving sooner we may very well have to attack it across the whole system and work on regulation, enforcement, road-design, etc, in parallel with working on the flashy technology bits. If instead we decide that self-driving has to work in the complete mess that are roads today then AGI is quite possibly a requirement.