It doesn't matter how low the accident rate for SDC's go if they do not go to absolute zero.
If you, the customer, want to allow the manufacturer to dodge the liability in their product, then fine - go ahead and do it. However, if that product then harms me on a public road, the manufacturer doesn't get to claim "Well, our customer agreed to the EULA".
The "low accident rate makes it moot" only makes it moot for those who accept it - i.e. the SDC customer. Unfortunately for the manufacturer, any defect in their product that harms a third party means that the manufacturer is still liable.
That's the current law. I do not foresee any changes to it to accomodate self-driving cars. In fact, I would vigourously oppose any law that prevents me from taking a manufacturer to task for an error made in the decision-making in its product.