If driving is miserable, that means lots of people that dont want to do it. If traffic is chaotic, that means a good place to improve their software.
The _road layout_ is awful, but drivers are pretty cooperative on the whole. Certainly more than my years driving in DC, for instance.
Granted, you need to be commmital here: if you put on your turn signal, drivers will generally make space for you to get in - briefly - but you need to be quick to take advantage of the gap. I could see Waymo being too slow to the draw for this, based on what I've seen online.
One more lane, bro, one more self driving car company, bro... :-)