Agreed, it seems inevitable that autonomy and insurance are going to be bundled.
1. Courts are finding Tesla partially liable for collisions, so they've already got some of the downsides of insurance (aka the payout) without the upside (the premium).
2. Waymo data shows a significant injury reduction rate. If it's true and not manipulated data, it's natural for the car companies to want to capture some of this upside.
3. It just seems like a much easier sell. I wouldn't pay $100/month for self-driving, but $150 a month for self-driving + insurance? That's more than I currently pay for insurance, but not a lot more. And I've got relatively cheap insurance: charging $250/month for insurance + self-driving will be cheaper than what some people pay for just insurance alone.
I don't think we need to hit 100% self-driving for the bundled insurance to be viable. 90% self-driving should still have a substantially lower accident rate if the Waymo data is accurate and extends.