Waymo may not be a revenue behemoth currently but there is immense value there not only to self-driving but to maps improvement and more.
I am not a fan of software patents but they have surpassed Toyota in patents [1] and there are hundreds of patents from Waymo [2].
Everyday in Arizona Waymo vehicles you see them on every block.
The value extractors may not like not being able to extract value yet, but the product, research and value creation is very high and contributes today to improving Google product offerings outside of Waymo such as Maps [3].
Waymo has waymo value than is being extracted because it is still emerging from the product value creation nebula that business/marketing/analysts can't see and don't value as much as product/engineering/creative people.
[1] https://asia.nikkei.com/Business/Business-trends/Google-s-Wa...
[2] https://patents.justia.com/assignee/waymo-llc
[3] https://www.latimes.com/business/story/2019-10-09/waymo-mapp...